Notes about lecture: conservation law conserved quantaty allowable laws of physics, allowable rules 25:40 non-allowable law (in classical physics) can't retrodict the past (opposite of predict) non reversable if reversed, unpredictive (don't know this or that comes next) 29:20 predictive one way, not retrodivtive other way not reversable, "I" don't call it irreversable 30:10 classical physics doesn't allow probability conflicts with the rules of classical mechanics quantum mechanics are not deterministic ambiguity in knowledge of initial condition, so from this statistics in classical mechanics despite deterministic 33:30 how precise do you know the initial condition, this determins how far you can predict the future, example three day weather forcast other way around, if you know how far you want to predict, then you can determine how exact you need to know the initial condition 35:50 allowable, if every state has one incoming and one outgoing arrow next example: point particle(s) moving in space 37:30 first some preliminary mathematics vectors, coordinate systems coordinate system: describing space quantitatively space with three dimensions/coordinates but we are perfectly free to think of systems higher dimensioned or lower dimensioned 38:10 we are interested in describing the basic pricipals, so we don't have to restrict ourselves to specific examples a particle can move in one dimension, it can move in five dimensions, but for now we use three dimensions 39:30 three coordinates, doesn't matter where we put the origin, but it's easiest to put it at the (? 0 location) the three axis are mutually perpendicular label e.g, x, y, z or x1,x2, x3 40:00 still ambiguity about the rotation of the axis, which direction they go in fixing the origin, we also have to fix the orientation of the x,y,z axis theres a convention, right handed coordinate system, if you pick x and y, still need to decide is z pointing in the blackboard or out of it, we settle at right hand, x thumb, y inex finger, then z middle finger points out of the board towards us this is the right hand rule another convention, for distance we choose units 41:50 point is labled by x,y,z, thats also how we describe a particle 43:10 what is a vector has both length and direction, for example a position of a point, relative to it' origin, magnitude is the distance, and it has a direction don't think of a vector of being located anywhere 43:55 vector is the same, no matter where it is drawn in space, doesn't need to be drawn in space vector labled by bar on top, more precise a little arrow it could e.g. be velocity, it could be acceleration, it could be an electronic field it's got, length/magnitude, and it's gotndirection 47:55 (see formula) length equals square root the sum of squares of its components adding vectors, multiplying vectors by numbers 53:30 VectA+VectB=VectC VectA*VectB=AMagnit.*BMagnitude*cos(winkel feda) "the calculated dot product" the product of two vectors is not a vector, it's a number 1:00:00 we can display the dot product in component form VecA*VecB=Ax*Bx+Ay*By+Az*Bz, you can prove this with a little bit if trigonometry VectA*VectA=AMagnt.*AMagnit. 1:08:40 The velocity is the time derivative of the position Dot means derivative with respect to time (so this does not have to be writtenover and over again) Velocity is x of i dot (x1, x2, x3 for the coordinates) 1:13:50 acceleration is derivative of velocity or second derivative of xi, so it's written x with 2 dots X - position V - velocity a - acceleration r-Vector for radius, positiin vector 1:16:00 Formula of an object falling in gravitational field with constant acceleration, xt=a+bt+ct2 uniformly accelerated particle, that has acceleration 2c 1:18:00 Circular motion x+y achsis, the angle increases linearly feda=omega*t 2Pi/omega=period omega is the angular frequency X=cos(feda), y=sin(feda) derivatives of trigonometric functions velocityX=-omega*sin(omega)t angle between velocity and position? more on velocity, acceleration, calculated ways for this shown
711,000 people viewed this and learned at least a little bit in a very short time. It was a free class taught by an extremely educated man. Imagine the world we would live in if we had this kind of access to every class
I love this man. The way he explains things, the way he talks, the way he thinks, the way he moves, his wisdom. Having watched many of his lectures, I feel a deep friendship without ever having met him in person. Thank you so much, Lenny.
I remember watching videos like these before college, which definitely kindled a passion for physics and math deep inside me. Then I also started reading advanced books, which were not even part of the course syllabus, for example the famous series of books published by Lifshitz and Landau. Among other things, I published the step-by-step solutions to many of the classical physics problems in the first book "Mechanics" in an online course on Udemy (called: "Multivariable Calculus and Classical Physics problems"), which deals with the mathematics and physics of rigid bodies, non-inertial systems, and much more. This is to say that videos like these can be very helpful in inspiring youngsters to appreciate physics.
@@mpay2874 Oh I see, now it has a different name, it's called "Multivariable Calculus and Classical Physics problems", I decided to merge two courses into a single one, due to the strong connection between the two. So, yes, it is still available.
I'm in final year of my high-school and I'm slowly starting to love physics. Thinking about studying physics in undergraduate. So, spending my time watching these lectures.
Coin and dice configurations and laws of motion, conservation; infinite configuration space 22:00; non allowable laws, reversibility 26:00; vectors 37:30; particle position and motion and acceleration 1:05:30; 2 examples: motion on a line, circular motion 1:15:00;
First 16 minutes is the most succinct and persuasive explanation for conservation of energy I’ve sat through. A lot of people tend to explain it through tautologies.
Thank you stanford university for making this free to everyone, i decided to study physics however had (in germany) to decide between chemistry and physics as a school subject, i chose chemistry inorder to at least have some fundamental knowledge about it. Now i figured out that german university have their lectures uploaded however only on private servers which are unacessable to anyone whos not in their university. Thanks for giving me the chance to learn the basics to prepare for university
For those, who are starting this course..... It's very slow and a bit dull, But it's THE best. He won't show you experiments and stuff , but all your common questions and misunderstanding will be addressed in this course. Really it's the best.
Thank you Leonard and Stanford for this. The extras and insights mean a lot. You could lean this stuff from a Dover reprint, but learning it on a trajectory towards Scrodinger and company really helps one focus on what counts. I have been able to make quantum work for a long time, but I find myself returning to the roots over and over again to regain a sense of what I'm actually doing. I think lecture series like this are invaluable for contributing towards a future in which a significant subset of us understand what the world we can make claims about actually us.
Finally I found someone who is going to teach me the concepts in math I need to understand my big love, astrophysics, a little better. That it's such a famous physicist, the better. I'm somewhat proud I still remember and understand most of what he talked about in this lecture although I graduated from high school 38 years ago although I never really needed this since then.
I really like the book as a companion to these lectures. It gave me deeper insight in some physics concepts that I used to just "take for granted" otherwise. The exercises also help for that matter and I can't wait for a quantum mechanics sequel and the rest of the series.
How I recommend watching these videos: 1 Get some notebook paper. 2 At the top of every sheet, write the UA-cam video's web address, UA-cam Channel & video name. 3 If Prof. Susskind writes it down, you should also write it. 4 Write a timestamp on the left side of your notes so you can easily get back to a given subject. 5 Pause when needed. 6 Re-watch a section if you're still unclear. 7 Go to Khan Academy if you need to brush up on, or learn new math concepts ( ua-cam.com/users/khanacademy )
MikeRoePhonicsMusic Thats exactly what I did, but with another youtube channel named Prof. Leonard, he teaches calc, great teacher btw. Ive filled 3 books worth of calculus, im at calculus 2 rn.
I had lost my way and my love of physics due to depression. Decided to take a break from my astrophysics studies for a year. I think I will spend the year going through his lectures just to see if I can fall in love with physics again.
[Paraphrased] "There are some things you only want to experience once, like a book. You don't want to read the same thing over and over again. But there are other things, like music, that you'll want to listen to continually because it just feels good. I hope my lectures are like that... (paraphrased)." Why yes, Professor Susskind, your lectures are a treasure to listen to. Stanford for the win. :)
Yes, but perhaps the world is full of people who do not have the same grasp or perspective. Plus, one can never over emphasize the basics. This is what separates great teachers from ordinary ones. I find that a lot of the students brush through the basics and find later that they do not have a deep understanding. The concepts of state/phase space are actually not as simple and are so critical in understanding a lot of the world, it is worth spending some time on. He is a great teacher!
All 'basic' scientific concepts took countless ph.d's and resesrch over 1000s of years. A simple idea like system's states can take more than a lifetime to understand. Very few people can grasp the true value and scale of fundamentals.
Confused? Sloppy? Look at his lecture on 'Demystifying the Higgs Boson' - Of all the lectures this was the clearest overview of all of the great rash of such lectures that came out this year. I find the lectures leave me just enough to think about and sort out myself. I am a big fan.
Well I am a high school student and I am glad that some great universities give a way knowledge for free. I love Walter Lewins Videos he is a great lecturer but they are limited to classical mechanic and electromagnetism. nothing complicated just freshmen's physics.
"Thinkwell". It's online lectures with a fantastic instructor. Not sure how much it is since my university uses it as a supplement to the class, but it is probably worth every penny. It has made calculus my easiest class. You'll be knocking derivatives out of the park in no time. Just google Thinkwell calculus.
According to this source, dice was once the plural of die, “but in modern standard English dice is both the singular and the plural: 'throw the dice' could mean a reference to either one or more than one dice.”
1:06:15 : the r doesn't stand for radius. The official explanation is that the position of a single point in space can be defined by three different rotations defined in a rotational matrix. So the r stands for rotation
I have a question: Are there exercises (and solutions) that was made for this lecture? I really like Susskind's lectures but I think one can only learn, if you do exercises. So I'd really like to get access to exercises that fits to this lecture. If anybody can give me some hints, where to find such exercises, I'd be very grateful. :)
Time in nature might not actually be the abstract of perceiving it as going back or forward to actual events but instead are actually the observable chronological movements of objects that are speeding up or slowing down "DEPENDING" on the level(amount) of gravity and perhaps G-force that's constricting or not constricting the atoms that gives the "OBSERVABLE CHRONOLOGICAL MOVEMENT" we all see around us
at 19:03, the laws of evolution for die world are categorized by number and TYPE of cycles, e.g. there might be three cycles: one 1-cycle, one two-cycle and one 3-cycle, like his example but there could also be three 2-cycles, so it is more than just the number of cycles - as he hinted.
The book is called The theoretical minimum. Authors Susskind and Hrabovsky. The latter added some extra mathematics parts where needed. Electromagnetism is discussed, Hamiltonians, Poisson brackets etc.
+Klanos 2x and 1.5x for me, but I had to go back to the stuff on dot product and proving the law of cosines cause I was playing Factorio and not paying attention. I love the speed feature of UA-cam. I feel like I have been robbed of some of my life because I didn't discover it sooner xD
carrying on from lower post ,if a speed is constant then i'm intuitively confident that the G-force will remain and acceleration would "NOT" be a factor "IF THERE ARE NO OUTSIDE FORCES LIKE ATMOSPHERIC FRICTION"-An example would be the vacuum of space that would not require acceleration to continue the G-force effect once the optimum speed has been obtained- -So provided the atomic clock that slowed in the plane had continued motion(IN atmosphere that creates friction acceleration would be needed for constant speed "BUT" in vacuum of space "ACCELERATION WOULD "NOT" be needed for continued "PALPABLE/OBSERVABLE" G-force effect once the optimum speed is obtained) the atomic clock's movement of atoms "MIGHT ACTUALLY" be constricted by a miniscule G-force effect , thus slowing down the chronological movement of hands or digital face-Even light is affected by Gravity (as in gravity lensing) and i should imagine it's restriction would include anything observable by us-In the "MOVING" airplane cabin air and other unseen things may be the "OTHER" key factors interacting with motion to create the miniscule G-force effect that restricts the movement of atoms in atomic clock that creates the slowing down of it's actions as a clock-THIS might be the reason for time slowing down when movement is applied "OR" extreme gravity is applied and not the classical idea of the ability to go forward or back in time to see past or future events-THE black holes theoretically churning out constantly huge numbers of these gravity repeling particles and any matter with gravity to cause the expansion of the universe- "raw" Quantum particles which are in unusually small size repelling gravity and any matter with gravity(unlike the ones on earth )
Susskind: *show a group of people how to draw a simple 2-dimensional graph* Also Susskind: *Assumes that the same group of people can differentiate trigonometric functions*
@@hiruki8 u didn't get the joke lol. Susskind tries to explain simple stuff and skips over relatively advanced stuff ( students know both) but just the way he is going on
Can someone help me on how to work out the simple equation in the beginning? I can't find anything online to help me work it out. I can only think using trial and error working up from 1-2, 2-3 etc. I have no idea how to start working out that equation and I know it should be easy.
I'm 14. I don't understand everything, but this stuff is presented really easily and Prof. Susskind is great so I probably get at least 75% of this. Can't wait to go to university. ;)
Could please activate in the video the option of automatic subtitles, that depends on the administrator, if they do not activate the other people does not get that option. Podrían por favor activar en el vídeo la opción de subtitulos automáticos, eso depende del administrador, si no lo activan a las otras personas no le sale esa opción.
"can anyone guess what my first picture will be?" to that poor guy "of course you can, you've been here before." 💀💀💀💀 Bro got roasted in front of the entire class by the damn professor 😭
Who cares about your boring method of developing it? Basically every university develops it they way you suggested, and it's boring. This lecture was wonderful, because he provided a very important insight on something that goes beyond physics: It was a way to look AT physics from the outside. He tried to explain what physics actually is, and moved slowly from there into trying to develop a conceptual framework as a motivation for developing it. You couldn't even grasp that little...
The point of using modulo arithmetic is that you don't even need to assign value 6 on the dice to 0, because 0, 6, 12, etc. are considered the "same" element (they belong to same equivalency class).
Will he talk about the Hamiltonian mechanics and Legendre transformation later in this course? I am looking for physics underlying Symplectic and Poisson Geometry would appreciate it if you introduce some materials to me.
1:23:33 Actually, the dot product being zero isn't enough information to draw the velocity vector. The sign of vx tells you what direction the perpendicular vector is pointing in.
Think wind. Imagine a wind tunnel in the shape of an enormous cube and two adjacent walls and the floor are fans or air conditioners. For the sake of simplicity, ignore gravity and friction. Where's a speck of lint at any particular moment in time starting from a particular location. Basically I visualize most new information as wind or the equivalent in space, in which the various forces, described by vectors, result in a path some object moves.
I have a question: I plan to watch all these lectures by Mr Susskind on classical mechanics, but will I get anything out of these lectures without an accompanying textbook? Thanks.
+potugadu Yeah, I'm in the same situation and I've found something interesting here: ocw.mit.edu/courses/physics/8-09-classical-mechanics-iii-fall-2014/readings/ Hope that helps!
+loc tran Thanks. Honestly, I prefer not to read a textbook. I am neither looking to pursue a career in physics nor knowledge of physics required for my job; I am just curious about theoretical physics. So, I wanted to know if I can get by with just watching the lectures. I am willing to put pen to the paper, though. I did calculus based physics in high school & for a quarter in college long time back, and I consider my knowledge of physics & calculus still pretty good. BTW, lot of reviews of Landau & Lifshitz on Amazon state that it is not a beginner's book. A book by Georg Joos was recommended instead.
+potugadu Totally right! Landau is horrible even for the ones who study physics =)), it rather be a doc for reviewing when you've already cover all the stuff, I think. If you want to dig (but not too deep) in the physics, Taylor's or Thornton & Marion's would also be a good option. Or you can wait until the Edx have this course. It's well-fitted to those who prefer self-study, especially to study without reading textbook. :)
loc tran Thanks for recommending Taylor's book. Read reviews that it is a perfect book for self study. An edx/online course on theoretical physic will be great for learning with some structure & discipline, and also to finish the learning/course in fixed amount of time. For me, any study/learning with no deadlines means never completing the study.
+potugadu the best accompanying to this playlist is Susskind's book "Theoretical Minimum: What You Need to Know to Start Physics. and for the playlist on Quantum Mechanics is his other book.
I think what he means is that some systems are different from others. Like you know, Euclidean geometry is different from Riemannian sphere geometry because it plays by different rules. So for example, the system of the coin (and only the coin), according to him, has only 1 rule. Nothing ever changes. However, in the system of the universe, we have many different rules, and that not everything stays the same.
In a scaling coordinate frame, there are infinite causal webs; modeling systems in such frames demonstrates false causality by evident irreversible determinism. This makes aperiodic systems cyclical by placing them in a larger context. Irreversibility highlights cyclic emergence.
In science, when predicting how it works, everywhere we seek for a deterministic solution. Hence Probability is only required if some laws of science seems to be uncertain by the law itself, such as putting a bird in a cage and calculating its displacement at time t to the initial displacement. Similar to the Heisenberg's uncertainty principle of quantum Physics. If something is in-deterministic in science and it seems by only the limitation of our knowledge, then we consider probability, but probability is the part we want to avoid to use in determining quantities in science, but it does and without that it may become more unpredictable...
In summary: Classical physics is deterministic. The final state of a system depends on its initial state based upon the conditions that govern those states. Right?
1st of all. Thank you You are one of the greatest teachers I've ever come across. You love this Sh*t and it shows. I have one question. Do you mind showing me the equation of the simple rotating dice example. The one where 1 goes to 2 which goes to 3, etc... I apologize I am but a lowely plumber and electrician. I have been extremely interested in general relativity and quantum physics for over 30 years but the equations are over my head. Thank you
as below (continuing from below post) if movement of atoms are slowed down by gravity perhaps it might not apply to raw quantum particles whose(theoretically) sheer small size causes gravity to no longer exist making it repel anything with gravity on their own -If a quantum particle is used to explain the theory of dark energy , the dipole repellor and shapely attractor , a quasar at the heart of a black hole as a quantum particle that repels anything with gravity then that particle may not have gravity to constrict it's movement because gravity theoretically does not interact with it-What if the reason for a quantum particle to be "seemingly everywhere possible at the same time" is because gravity at that small scale does not exist to impede movement (gravity lensing shows that gravity impedes light at least in one direction by bending light but does not slow it down , perhaps because properties of light allow it's interactions with gravity to behave differently)-If that turns out true then the slowing down of such a particle the faster you go may not happen because they may behave differently to atoms that are governed by gravity or G-force --But in nature would you be able to find raw quantum particles that repel gravity?? If yes then you'll certainly won't find them here in an environment awash with gravity since their repelling nature of gravity would force them anywhere outside the influence of objects with gravity
It's a bit confusing that he uses dice and coins which are in the realm of probabilities to explain deterministic outcomes and states of a classical system
tlhelle....true Leo might not be thE best teacher in the world like Lewin......but he is a mastermind.....& we are lucky he does this cuz he likes to.....you also gotta remember these are just cont Ed classes.....i agree a bit disorged but free....& his new GR lectures 7 & 8 are just priceless !.... as many of his are....free mind candy for the masses....1 way 2 help fix the future 4 sure !
It is a great honor for me to meet you. However, We would like to inform you that the video ua-cam.com/video/LIzqmOv2lHc/v-deo.html has been uploaded on my channel. Please have a look.
It's interesting that Newton did not use Cartesian coordinates in his Principia, considering that he was 7 years old when Rene Descartes died. Newton knew which shoulders of giants not to stand on. Incidentally negative numbers were not accepted until the seventeenth century, so just +X and +Y positive quadrant or area before then.
no one bothered correcting the professor 28:00 , it is ETETET... not ETTE... , i don't know why was he lost throughout the whole lecture. not hating, just saying.
Notes about lecture:
conservation law
conserved quantaty
allowable laws of physics, allowable rules
25:40
non-allowable law (in classical physics)
can't retrodict the past (opposite of predict)
non reversable
if reversed, unpredictive (don't know this or that comes next)
29:20
predictive one way, not retrodivtive other way
not reversable, "I" don't call it irreversable
30:10
classical physics doesn't allow probability
conflicts with the rules of classical mechanics
quantum mechanics are not deterministic
ambiguity in knowledge of initial condition, so from this statistics in classical mechanics despite deterministic
33:30
how precise do you know the initial condition, this determins how far you can predict the future, example three day weather forcast
other way around, if you know how far you want to predict, then you can determine how exact you need to know the initial condition
35:50
allowable, if every state has one incoming and one outgoing arrow
next example: point particle(s) moving in space
37:30
first some preliminary mathematics
vectors, coordinate systems
coordinate system: describing space quantitatively
space with three dimensions/coordinates
but we are perfectly free to think of systems higher dimensioned or lower dimensioned
38:10
we are interested in describing the basic pricipals, so we don't have to restrict ourselves to specific examples
a particle can move in one dimension, it can move in five dimensions, but for now we use three dimensions
39:30
three coordinates, doesn't matter where we put the origin, but it's easiest to put it at the (? 0 location)
the three axis are mutually perpendicular
label e.g, x, y, z or x1,x2, x3
40:00
still ambiguity about the rotation of the axis, which direction they go in
fixing the origin, we also have to fix the orientation of the x,y,z axis
theres a convention, right handed coordinate system, if you pick x and y, still need to decide is z pointing in the blackboard or out of it, we settle at right hand, x thumb, y inex finger, then z middle finger points out of the board towards us
this is the right hand rule
another convention, for distance we choose units
41:50
point is labled by x,y,z, thats also how we describe a particle
43:10
what is a vector
has both length and direction, for example a position of a point, relative to it' origin, magnitude is the distance, and it has a direction
don't think of a vector of being located anywhere
43:55
vector is the same, no matter where it is drawn in space, doesn't need to be drawn in space
vector labled by bar on top, more precise a little arrow
it could e.g. be velocity, it could be acceleration, it could be an electronic field
it's got, length/magnitude, and it's gotndirection
47:55 (see formula) length equals square root the sum of squares of its components
adding vectors, multiplying vectors by numbers
53:30
VectA+VectB=VectC
VectA*VectB=AMagnit.*BMagnitude*cos(winkel feda) "the calculated dot product"
the product of two vectors is not a vector, it's a number
1:00:00
we can display the dot product in component form
VecA*VecB=Ax*Bx+Ay*By+Az*Bz, you can prove this with a little bit if trigonometry
VectA*VectA=AMagnt.*AMagnit.
1:08:40
The velocity is the time derivative of the position
Dot means derivative with respect to time (so this does not have to be writtenover and over again)
Velocity is x of i dot (x1, x2, x3 for the coordinates)
1:13:50
acceleration is derivative of velocity or second derivative of xi, so it's written x with 2 dots
X - position
V - velocity
a - acceleration
r-Vector for radius, positiin vector
1:16:00
Formula of an object falling in gravitational field with constant acceleration,
xt=a+bt+ct2
uniformly accelerated particle, that has acceleration 2c
1:18:00
Circular motion
x+y achsis, the angle increases linearly
feda=omega*t
2Pi/omega=period
omega is the angular frequency
X=cos(feda), y=sin(feda)
derivatives of trigonometric functions
velocityX=-omega*sin(omega)t
angle between velocity and position?
more on velocity, acceleration, calculated ways for this shown
U saved my life bro
Lol. It's "Theta" not "feda".
Susskind dinleyen türkler var duygulandım :D
holy ish dude i cant believe u took the time
Ayıp ettin
711,000 people viewed this and learned at least a little bit in a very short time. It was a free class taught by an extremely educated man. Imagine the world we would live in if we had this kind of access to every class
Capitalist will loose their mind unfortunately education should be free for everyone
그냐
I love this man. The way he explains things, the way he talks, the way he thinks, the way he moves, his wisdom. Having watched many of his lectures, I feel a deep friendship without ever having met him in person. Thank you so much, Lenny.
How are u doing now, 3 years later
@@YasoHisham They got married.
@@mtmind6560a beautiful relationship blossomed after such hard Dick riding
I remember watching videos like these before college, which definitely kindled a passion for physics and math deep inside me. Then I also started reading advanced books, which were not even part of the course syllabus, for example the famous series of books published by Lifshitz and Landau.
Among other things, I published the step-by-step solutions to many of the classical physics problems in the first book "Mechanics" in an online course on Udemy (called: "Multivariable Calculus and Classical Physics problems"), which deals with the mathematics and physics of rigid bodies, non-inertial systems, and much more. This is to say that videos like these can be very helpful in inspiring youngsters to appreciate physics.
The Udemy course you mentioned is not showing up. Is that still available ?
@@mpay2874 Oh I see, now it has a different name, it's called "Multivariable Calculus and Classical Physics problems", I decided to merge two courses into a single one, due to the strong connection between the two. So, yes, it is still available.
I'm in final year of my high-school and I'm slowly starting to love physics. Thinking about studying physics in undergraduate. So, spending my time watching these lectures.
Coin and dice configurations and laws of motion, conservation; infinite configuration space 22:00; non allowable laws, reversibility 26:00; vectors 37:30; particle position and motion and acceleration 1:05:30; 2 examples: motion on a line, circular motion 1:15:00;
49:05 Yes professor, your lectures are like the music that one want to hear over and over again. ❤️
First 16 minutes is the most succinct and persuasive explanation for conservation of energy I’ve sat through. A lot of people tend to explain it through tautologies.
Native English speaker and I literally just learned the word 'retrodict' (opposite of predict) from Lenny. The perks of this class are boundless.
Not a native speaker and I learned die and retrodict too
hello brother
You are the definition of people who are awesome, Professor Leonard Susskind.
LONG LIVE Leonard Susskind.
We need you like how we need water to live.
100%
One of the World's leading Physicists and Teachers, showing how to teach Science
Thanks Stanford. These lectures really get you interested into science and just the aspect of being in a university itself.
Thank you stanford university for making this free to everyone, i decided to study physics however had (in germany) to decide between chemistry and physics as a school subject, i chose chemistry inorder to at least have some fundamental knowledge about it. Now i figured out that german university have their lectures uploaded however only on private servers which are unacessable to anyone whos not in their university.
Thanks for giving me the chance to learn the basics to prepare for university
Extremely thanks for providing such quality content for free of cost and enabling it to be accessible from everywhere.
#LovefromIndia
Nandha Kumar yes this is one of the great things about our world today
❤️
For those, who are starting this course..... It's very slow and a bit dull, But it's THE best. He won't show you experiments and stuff , but all your common questions and misunderstanding will be addressed in this course. Really it's the best.
Thank you Leonard and Stanford for this. The extras and insights mean a lot. You could lean this stuff from a Dover reprint, but learning it on a trajectory towards Scrodinger and company really helps one focus on what counts. I have been able to make quantum work for a long time, but I find myself returning to the roots over and over again to regain a sense of what I'm actually doing. I think lecture series like this are invaluable for contributing towards a future in which a significant subset of us understand what the world we can make claims about actually us.
Finally I found someone who is going to teach me the concepts in math I need to understand my big love, astrophysics, a little better. That it's such a famous physicist, the better.
I'm somewhat proud I still remember and understand most of what he talked about in this lecture although I graduated from high school 38 years ago although I never really needed this since then.
listen to startalk if you love astrophysics!
ozdergecko the Closer to Truth channel has a lot of good conversations about cosmology and astronomy stuff.
@@tomstalley3179 can you comment the link of the channel? or is he a person?
Puspita Das just search ‘startalk’ kn UA-cam, it’s Neil degrasse Tyson’s channel
He is always extraordinary..he always find the simplest version of explaination!!if anyone don't understand him,he never understand physics.
46:00 When a world-leading theoretical physicist struggles to draw a vector in three dimensions, there's hope for us all.
it's normal. My grandfather Ph.D in his 80 can't even draw a 2d vector lol
JLongTom Lenny in perfectly imperfect!
Даниель Крузе (But u didnt say what area your grandfather specialised in, lol.
not in art ^
JLongTom haha
I clicked classical mechanics and I'm watching graph theory. This is gonna be good!
53:30 That little slip from his Quantum Mechanics lectures
Christopher Soelistyo I know this is a super old comment but HAHA I saw that.
I really like the book as a companion to these lectures. It gave me deeper insight in some physics concepts that I used to just "take for granted" otherwise. The exercises also help for that matter and I can't wait for a quantum mechanics sequel and the rest of the series.
49:09
Such a good analogy. And yes, Prof. Susskind, your lectures are like good music. Bravo maestro and thank you.
This was hilarious
How I recommend watching these videos:
1 Get some notebook paper.
2 At the top of every sheet, write the UA-cam video's web address, UA-cam Channel & video name.
3 If Prof. Susskind writes it down, you should also write it.
4 Write a timestamp on the left side of your notes so you can easily get back to a given subject.
5 Pause when needed.
6 Re-watch a section if you're still unclear.
7 Go to Khan Academy if you need to brush up on, or learn new math concepts ( ua-cam.com/users/khanacademy )
MikeRoePhonicsMusic Thats exactly what I did, but with another youtube channel named Prof. Leonard, he teaches calc, great teacher btw. Ive filled 3 books worth of calculus, im at calculus 2 rn.
OneInfiniti MathBoi I watch Professor Leonard.
I agree Prof Superman (Leonard) is awesome!
Last 15 minutes, describing of circular motion, was awesome! Everything become clear!
This is the thing with top Institutions... They teach you 'how to think' rather than what to think.
Indeed your lectures are amazing everytime we hear them.
I had lost my way and my love of physics due to depression. Decided to take a break from my astrophysics studies for a year. I think I will spend the year going through his lectures just to see if I can fall in love with physics again.
if u dont love physics, u literally dont want to understand reality, and that's like death
These lectures have changed my life! Watching this feels nostalgic!
[Paraphrased] "There are some things you only want to experience once, like a book. You don't want to read the same thing over and over again. But there are other things, like music, that you'll want to listen to continually because it just feels good. I hope my lectures are like that... (paraphrased)." Why yes, Professor Susskind, your lectures are a treasure to listen to. Stanford for the win. :)
Yes, but perhaps the world is full of people who do not have the same grasp or perspective. Plus, one can never over emphasize the basics. This is what separates great teachers from ordinary ones. I find that a lot of the students brush through the basics and find later that they do not have a deep understanding. The concepts of state/phase space are actually not as simple and are so critical in understanding a lot of the world, it is worth spending some time on.
He is a great teacher!
All 'basic' scientific concepts took countless ph.d's and resesrch over 1000s of years. A simple idea like system's states can take more than a lifetime to understand. Very few people can grasp the true value and scale of fundamentals.
I've never seen a video on classical mechanics that quite starts like this, informative
Just 10 minutes in, I already have a feeling I'd learn more once I finish watching this vid than 10 hours in class...
jesus this is incredible
it's like watching the hulk trying teach someone how to lift a 10lb dumbell
Super N0iS3 😂 lol bro
@Andrew Walter III Kaamo 'D La Simmetrie what the fuck
@@ForeverStill_Fan1 and physics.
@@Joepage69 Don't use phone then. Be a Priest.
Without Physics you are still trieng to use Pigeons as mail man.
@@sadunfdo2888 physics is very much the unknown that was my point it changes all the time
Once again im glad to find a lecture from stanford to help me learn more
This guy teaches classical mechanics in one class and can teach string theory in the other, hat's off to you
oh its unbelievable... Thank you so much to Standford and this gentle man
Confused? Sloppy? Look at his lecture on 'Demystifying the Higgs Boson' - Of all the lectures this was the clearest overview of all of the great rash of such lectures that came out this year. I find the lectures leave me just enough to think about and sort out myself. I am a big fan.
Well I am a high school student and I am glad that some great universities give a way knowledge for free. I love Walter Lewins Videos he is a great lecturer but they are limited to classical mechanic and electromagnetism. nothing complicated just freshmen's physics.
"Thinkwell". It's online lectures with a fantastic instructor. Not sure how much it is since my university uses it as a supplement to the class, but it is probably worth every penny. It has made calculus my easiest class. You'll be knocking derivatives out of the park in no time. Just google Thinkwell calculus.
According to this source, dice was once the plural of die, “but in modern standard English dice is both the singular and the plural: 'throw the dice' could mean a reference to either one or more than one dice.”
1:06:15 : the r doesn't stand for radius. The official explanation is that the position of a single point in space can be defined by three different rotations defined in a rotational matrix. So the r stands for rotation
Leonardo,your lectures ARE music to our ears
This is invaluable, i love learning tho I cant afford to go to a big university
In
r u alive now
Bad for you to not be french
You can apply for financial aid
@@jolanmoussier9267 what?
I have a question: Are there exercises (and solutions) that was made for this lecture? I really like Susskind's lectures but I think one can only learn, if you do exercises. So I'd really like to get access to exercises that fits to this lecture. If anybody can give me some hints, where to find such exercises, I'd be very grateful. :)
Time in nature might not actually be the abstract of perceiving it as going back or forward to actual events but instead are actually the observable chronological movements of objects that are speeding up or slowing down "DEPENDING" on the level(amount) of gravity and perhaps G-force that's constricting or not constricting the atoms that gives the "OBSERVABLE CHRONOLOGICAL MOVEMENT" we all see around us
at 19:03, the laws of evolution for die world are categorized by number and TYPE of cycles, e.g. there might be three cycles: one 1-cycle, one two-cycle and one 3-cycle, like his example but there could also be three 2-cycles, so it is more than just the number of cycles - as he hinted.
Highly insightful lectures I ever came across, thank you sir for your work
The book is called The theoretical minimum. Authors Susskind and Hrabovsky. The latter added some extra mathematics parts where needed. Electromagnetism is discussed, Hamiltonians, Poisson brackets etc.
Put it at 1.25 speed. Saved my life.
+Klanos 2x and 1.5x for me, but I had to go back to the stuff on dot product and proving the law of cosines cause I was playing Factorio and not paying attention. I love the speed feature of UA-cam. I feel like I have been robbed of some of my life because I didn't discover it sooner xD
+Klanos You, my friend are a fucking genius and I would forever be in your debt!
thank god i went down here before i saw the vid
Thank you so much!(:
Great suggestion. Thanks.
Wow. That cleared up a lot for me. I'm looking forward to the next lecture.
carrying on from lower post ,if a speed is constant then i'm intuitively confident that the G-force will remain and acceleration would "NOT" be a factor "IF THERE ARE NO OUTSIDE FORCES LIKE ATMOSPHERIC FRICTION"-An example would be the vacuum of space that would not require acceleration to continue the G-force effect once the optimum speed has been obtained- -So provided the atomic clock that slowed in the plane had continued motion(IN atmosphere that creates friction acceleration would be needed for constant speed "BUT" in vacuum of space "ACCELERATION WOULD "NOT" be needed for continued "PALPABLE/OBSERVABLE" G-force effect once the optimum speed is obtained) the atomic clock's movement of atoms "MIGHT ACTUALLY" be constricted by a miniscule G-force effect , thus slowing down the chronological movement of hands or digital face-Even light is affected by Gravity (as in gravity lensing) and i should imagine it's restriction would include anything observable by us-In the "MOVING" airplane cabin air and other unseen things may be the "OTHER" key factors interacting with motion to create the miniscule G-force effect that restricts the movement of atoms in atomic clock that creates the slowing down of it's actions as a clock-THIS might be the reason for time slowing down when movement is applied "OR" extreme gravity is applied and not the classical idea of the ability to go forward or back in time to see past or future events-THE black holes theoretically churning out constantly huge numbers of these gravity repeling particles and any matter with gravity to cause the expansion of the universe- "raw" Quantum particles which are in unusually small size repelling gravity and any matter with gravity(unlike the ones on earth )
I would like to thank the professor for his nice and interesting lecture he did!!!!!!!!!!!!
Susskind: *show a group of people how to draw a simple 2-dimensional graph*
Also Susskind: *Assumes that the same group of people can differentiate trigonometric functions*
@@hiruki8 u didn't get the joke lol. Susskind tries to explain simple stuff and skips over relatively advanced stuff ( students know both) but just the way he is going on
@@sirius3333 I think she just explained it further
In my opinion he's the most brilliant man in the world .
Cringe
I mean, you can't lean such great towards him. We do have Michio Kaku, Brian Greene, Tyson, Penrose etc. ❤️
@@Photonlightt yes true .
These videos are absolutely fantastic. Leonard Susskind is amazing!
Can someone help me on how to work out the simple equation in the beginning? I can't find anything online to help me work it out. I can only think using trial and error working up from 1-2, 2-3 etc. I have no idea how to start working out that equation and I know it should be easy.
I'm 14. I don't understand everything, but this stuff is presented really easily and Prof. Susskind is great so I probably get at least 75% of this. Can't wait to go to university. ;)
tomtucjr are you happy now , 6 years later . are you in a university ? opted for STEM ?
Could please activate in the video the option of automatic subtitles, that depends on the administrator, if they do not activate the other people does not get that option.
Podrían por favor activar en el vídeo la opción de subtitulos automáticos, eso depende del administrador, si no lo activan a las otras personas no le sale esa opción.
I am willing to give half of my life, to get a teacher like Lenard Susskind.
"can anyone guess what my first picture will be?" to that poor guy "of course you can, you've been here before." 💀💀💀💀 Bro got roasted in front of the entire class by the damn professor 😭
My brain lasted for 55 minutes. Started to watch bits again more to try and understand. Great lecture.
Who cares about your boring method of developing it?
Basically every university develops it they way you suggested, and it's boring.
This lecture was wonderful, because he provided a very important insight on something that goes beyond physics: It was a way to look AT physics from the outside. He tried to explain what physics actually is, and moved slowly from there into trying to develop a conceptual framework as a motivation for developing it.
You couldn't even grasp that little...
53:25
That's what happens when you do Quantum mechanics alot
This made me laugh 😂
hahah!
Hey do u know what the general eqn was for the six-sided die? I cant figure it out
Ah my god
Which is easier, classical mechanics or quantum mechanics? I am only just today starting to study classical mechanics.
Mike from Breaking Bad
Now , I can't unsee😂
Put your pencil away Walt. I’m not having a lecture with you.
@@IAyala1010💀💀☠️
😂😂😂
The point of using modulo arithmetic is that you don't even need to assign value 6 on the dice to 0, because 0, 6, 12, etc. are considered the "same" element (they belong to same equivalency class).
Will he talk about the Hamiltonian mechanics and Legendre transformation later in this course? I am looking for physics underlying Symplectic and Poisson Geometry would appreciate it if you introduce some materials to me.
didn't know mike ermanthraut had the best classical mechanics lecture series on youtube
Professor Susskind, thank you for these videos. Theoretical Minimum Classes suit me to a tee. I really like them.
1:23:33 Actually, the dot product being zero isn't enough information to draw the velocity vector. The sign of vx tells you what direction the perpendicular vector is pointing in.
"Mechanics is basically a set of rules about what those laws of motion look like" ❤️
This is fantastic, thanks to Stanford and professor Susskind :)
This is amazing. Big Thanks to Stanford and to L. Susskind.
For free???
Imagine explaining physics in a simplified way thanks alot
Think wind. Imagine a wind tunnel in the shape of an enormous cube and two adjacent walls and the floor are fans or air conditioners. For the sake of simplicity, ignore gravity and friction. Where's a speck of lint at any particular moment in time starting from a particular location. Basically I visualize most new information as wind or the equivalent in space, in which the various forces, described by vectors, result in a path some object moves.
I am very much interested in mass, acceleration, force, distance and energy. I like this video. He explains in very simple manner.
I have a question: I plan to watch all these lectures by Mr Susskind on classical mechanics, but will I get anything out of these lectures without an accompanying textbook?
Thanks.
+potugadu Yeah, I'm in the same situation and I've found something interesting here: ocw.mit.edu/courses/physics/8-09-classical-mechanics-iii-fall-2014/readings/
Hope that helps!
+loc tran Thanks. Honestly, I prefer not to read a textbook. I am neither looking to pursue a career in physics nor knowledge of physics required for my job; I am just curious about theoretical physics. So, I wanted to know if I can get by with just watching the lectures. I am willing to put pen to the paper, though. I did calculus based physics in high school & for a quarter in college long time back, and I consider my knowledge of physics & calculus still pretty good.
BTW, lot of reviews of Landau & Lifshitz on Amazon state that it is not a beginner's book. A book by Georg Joos was recommended instead.
+potugadu Totally right! Landau is horrible even for the ones who study physics =)), it rather be a doc for reviewing when you've already cover all the stuff, I think. If you want to dig (but not too deep) in the physics, Taylor's or Thornton & Marion's would also be a good option.
Or you can wait until the Edx have this course. It's well-fitted to those who prefer self-study, especially to study without reading textbook. :)
loc tran Thanks for recommending Taylor's book. Read reviews that it is a perfect book for self study.
An edx/online course on theoretical physic will be great for learning with some structure & discipline, and also to finish the learning/course in fixed amount of time. For me, any study/learning with no deadlines means never completing the study.
+potugadu
the best accompanying to this playlist is Susskind's book "Theoretical Minimum: What You Need to Know to Start Physics. and for the playlist on Quantum Mechanics is his other book.
53:25
HAHAAHA best thing to write in classical mechanics.
I think what he means is that some systems are different from others. Like you know, Euclidean geometry is different from Riemannian sphere geometry because it plays by different rules. So for example, the system of the coin (and only the coin), according to him, has only 1 rule. Nothing ever changes. However, in the system of the universe, we have many different rules, and that not everything stays the same.
In a scaling coordinate frame, there are infinite causal webs; modeling systems in such frames demonstrates false causality by evident irreversible determinism. This makes aperiodic systems cyclical by placing them in a larger context. Irreversibility highlights cyclic emergence.
Camera guy gets a check+ for awesomeness.
Thanks for the download option. Pleas provide a link to playlist, eg. Classical Mechanics | Lecture 1
Loved the lecture so much.
In science, when predicting how it works, everywhere we seek for a deterministic solution. Hence Probability is only required if some laws of science seems to be uncertain by the law itself, such as putting a bird in a cage and calculating its displacement at time t to the initial displacement. Similar to the Heisenberg's uncertainty principle of quantum Physics. If something is in-deterministic in science and it seems by only the limitation of our knowledge, then we consider probability, but probability is the part we want to avoid to use in determining quantities in science, but it does and without that it may become more unpredictable...
I feel my IQ rising by just listening to his voice. His lectures are amazing.
Greetz from a german science channel :)
Is it appropriate to follow the theoretical minimum book written by Prof. Leonard himself for completeness with these lectures
Samarth Sai Lol Prof leonard? The one that taught calculus? Or am I wrong.
Samarth Sai opps lol, just realized this prof's name is also leonard, check out prof leonard if you need to learn calc btw.
In summary: Classical physics is deterministic. The final state of a system depends on its initial state based upon the conditions that govern those states.
Right?
1st of all. Thank you You are one of the greatest teachers I've ever come across. You love this Sh*t and it shows. I have one question. Do you mind showing me the equation of the simple rotating dice example. The one where 1 goes to 2 which goes to 3, etc... I apologize I am but a lowely plumber and electrician. I have been extremely interested in general relativity and quantum physics for over 30 years but the equations are over my head. Thank you
Vectors do not multiply like ordinary numbers. There is indeed vector multiplication but its very different from multiplication of numbers.
Searching Amazon for dental pliers to pull my molars. Thought I grasped the concepts from Dr. Lewin. Going on to a different concept of grasp.
as below (continuing from below post) if movement of atoms are slowed down by gravity perhaps it might not apply to raw quantum particles whose(theoretically) sheer small size causes gravity to no longer exist making it repel anything with gravity on their own -If a quantum particle is used to explain the theory of dark energy , the dipole repellor and shapely attractor , a quasar at the heart of a black hole as a quantum particle that repels anything with gravity then that particle may not have gravity to constrict it's movement because gravity theoretically does not interact with it-What if the reason for a quantum particle to be "seemingly everywhere possible at the same time" is because gravity at that small scale does not exist to impede movement (gravity lensing shows that gravity impedes light at least in one direction by bending light but does not slow it down , perhaps because properties of light allow it's interactions with gravity to behave differently)-If that turns out true then the slowing down of such a particle the faster you go may not happen because they may behave differently to atoms that are governed by gravity or G-force --But in nature would you be able to find raw quantum particles that repel gravity?? If yes then you'll certainly won't find them here in an environment awash with gravity since their repelling nature of gravity would force them anywhere outside the influence of objects with gravity
It's a bit confusing that he uses dice and coins which are in the realm of probabilities to explain deterministic outcomes and states of a classical system
tlhelle....true Leo might not be thE best teacher in the world like Lewin......but he is a mastermind.....& we are lucky he does this cuz he likes to.....you also gotta remember these are just cont Ed classes.....i agree a bit disorged but free....& his new GR lectures 7 & 8 are just priceless !.... as many of his are....free mind candy for the masses....1 way 2 help fix the future 4 sure !
You speak a tune with your voice so yes you make notes and numbers sounding like a song 🥰
I was having difficulties in understanding this course but I'm okay now after watching this
Thanks for the lecture
Here is the best video on Classical Mechanics ua-cam.com/video/LIzqmOv2lHc/v-deo.html please have a look
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It's interesting that Newton did not use Cartesian coordinates in his Principia, considering that he was 7 years old when Rene Descartes died. Newton knew which shoulders of giants not to stand on. Incidentally negative numbers were not accepted until the seventeenth century, so just +X and +Y positive quadrant or area before then.
He look like mike from breaking bad
exactly what i thought :D
AyoJeffy He IS Mike from Breaking Bad
nah he looks like mike from better call saul
Admit
Was thinking this watching season 5 of community today .. Sounds like him anyways
Good lecture. Helped me a lot. Just need to brush up on my calculus for derivatives of trigonometric functions.
Sam Smith if you know calculus and linear algebra the world of physics is more open to you
The Physics Connection Differential equations and other advanced math such as complex analysis and topology make physics easier to understand.
No tiene fuersas
No tiene fuersas el motor
Ke puedo ser pera mi troka
no one bothered correcting the professor 28:00 , it is ETETET... not ETTE... , i don't know why was he lost throughout the whole lecture. not hating, just saying.
He's 77 , was 71 in 2011
I agree, Lewins is a great teacher as well, he's awesome.