I am a commerce graduate works in the field of business administration. But i loved physics. I scored 100% in my 10th grade physics paper. But due to financial constraints could not pursue science stream. I have wet eyes watching your video. Thank you sir.
Lectures by Walter Lewin. They will make you ♥ Physics. this lecture alone is viewed more than 5000 times every day. Some believe that this is my best lecture ever. ua-cam.com/video/sJG-rXBbmCc/v-deo.html
speaking of Gravity.. both as it affects the Earth and The moon.... Very EXCELLENT demonstrations and Explanations. I know that Tides aren't apart of this discussion.. but just a thought here, We hear about the Ocean tides.. how the water RISES... but we never hear about how the Atmosphere Above the water Rises as well. Makes you wonder if there is an Atmospheric Tide that goes around the earth...... Pardon the Diversion here.. but having taken in your lecture on Gravity and all.. I just went off on a tangent.. :) Thanks..
This is Jagan Mohan from India. I'm a student of Mechanical Engineering. Learnt a lot of concepts from your lecturers. Thank you. Can you do a series on Fluid Mechanics and Basic Thermodynamics. Also can I get you mail id as I would like to send you a personal mail.
Der rätselhafte Geistergast gastiert sich bei dir ein und was du bist und was du hast, das ist nicht länger dein. Der rätselhafte Geistergast will mehr als nur Quartier, sein kleiner Reisebeutel fasst dein Herz und dein Klavier. Der rätselhafte Geistergast, Der nimmt dir Kopf und Leib. Er bleibt, solange es ihm passt und geht, wenn du sagst: Bleib. Author: Robert Gernhardt
We know that free falling objects(without any obstracle) pass the same way in equal time. That means the velocity of two different mass are same.It means the force of Gravity works on that two objects or mass similarly. But we know that the force of gravity is one kind of gravitational force. And gravitational force depends propotionally on the mass of objects . So the force of gravity would be less or high on that two mass. But why it is not? Why the force of gravity works similarly on different mass? 1) Does the force of gravity works on free falling objects?? If it is , then why the velocity of two different mass are same while they free fall?? 2) Does gravity exist in nature ?? 3) What is responsible for this?? Gravity or curved space?? Ahnaf Akif Student , Bangladesh.
Hello Professor! If you have a fly in the airplane with you, flying at the same speed, sitting on your armrest. When the fly takes off from your armrest to the armrest of the pilot sitting up at the other end of the airplane, will it be able to make it there? Have a great day prof!
sir, my doubt is not clear. Need your help. suppose two acclerating corrdinates are accelerating in same acceleration in respect of a inertial coordinate... but those accelerating object(corrdinates) don't know that they are accelerating(as they don't know about inertial coordinate).. the thing they can only do that they could relate themselves.. now, can they distinguish that they are acclerating(only relating themselves) or any other way?? will they feel some kind force or inertia as they are acclerating?? what they will feel?? will they be stationary inertial corrdinates in respect of themselves????
Gravitational force act's from a vertical height,however,the movement of planets and the moon is orbital with which a falling object couldn't be perpendicular to the Earth's surface,do you think that gravity can be a magnitude for distant objects related to our earth?
Sir, suppose a block is on the table and block is putting a force of ( mg) so what is g here ? . Because my teacher is saying that it is not acceleration due to gravity it is just GMe/r*2 .
In your example, think of g as having units of Newtons/kilogram, rather than m/s^2. Yes, they are algebraically identical units, but we'll get back to that later. The value of g indicates gravitational force per unit mass. Mass is a property of matter that indicates participation in the force of gravity, and gravitational field strength (g) is a property of the environment (i.e. a force field) that tells the mass what net gravitational force to experience. If no other forces act, then it would accelerate. But due to the fact that the normal force also acts, and opposes gravity, it remains at rest. Yes, it does become an acceleration in the special case of free fall or free projectile motion, which is why N/kg is equivalent to m/s^2. This is due to the fact that gravitational mass (m in F=G*M*m/r^2) and inertial mass (m in Fnet=m*a) are two properties of matter that are a package deal. Mass cancels out of the equation, and regardless of the properties of the body in motion, it experiences the same acceleration when no other forces apply. For the most part, g does equal G*Me/r^2 on the surface of this planet. However, this is only strictly true at the north and south poles. There is more to the story of g, when you account for the fact that A) Earth is not a perfect sphere, B) Earth is not uniform, and C) Earth is rotating, which means there is a little variation of the apparent value of g we experience across our planet's surface. The fact that Earth rotates means that some of the gravity is "used up" in causing us to rotate with it.
Much more love and respect sir !! I wana to learn and enjoy the physics .. I am an intermediate level student (2nd year),but I am weak in mathematics ,so you are kindly requested to recomend me mathematic book so that I can able to enjoy physics !! Thank you!!
si tengo una turbina con una "fuerza propulsora de 2g" y esta turbina me está succionando desde el cielo de forma que yo estando en tierra tengo la turbina que me succiona en dirección al cielo¿puedo flotar? ¿Serviria para contraarrestar la fuerza G en aviones de alta velocidad de forma que la turbina succione desde el frente del avion haciendo "escapar" el aire succionado por conductos con salidas en dirección opuesta al frente del avion y así atrayendo el cuerpo del piloto en dirección contraria a la fuerza ejercida por la aceleración?, espero haber hablado correctamente
+intamafidukduk If you already have a good background in Newtonian Mechanics, I recommend you watch all my 35 8.02x lectures first and then my 23 8.03x lecture. Make sure you also do the homework and take the exams. Homework, exams and Lecture Notes are posted below the video images.
thanks sir for your free videos, I am highly impressed by u ,could u send me your email I'd as I wanted to ask some questions and like u I have deep love for physics and pursue a teaching career.
+Arvind Sharma there are subtitles on all my 8.01x lectures. Also on my most popular lecture "For the Love of Physics". We are working on subtitles for 8.02x. That's all we will (can) do. Subtitling is very time-consuming and thus very expensive.
Thanks for all your effort..You are going by your words you are making all of us seeing through the equations. Thanks.. Also please provide any link to buy these small small demonstration scientific equipment's that you used in class..whole world will love to buy that.
+Arvind Sharma Browse amazon.com. They have some of the stuff I use for demos. secret top, toy gyroscope, wind hoses which excite resonances when you swing them around, rattle backs, dynamo flash lights . . . . . But most of my demos require equipment that is quite expensive; some is also very large in size and weight.
i took physics 25 years ago and i didn't quite enjoyed the subject .. these lectures ignited my interest again .. thx for posting ..
+Walid Nouh Walid you are very welcome - \\/\/////@lter Lewin
This is ingenious sir! Great respect for you. Your lectures have still kept the love for physics alive in me.
A Rock star 🙏💓👏. I have been using snippets of Mr.Lewin's lectures to drive home some fine nuances of the subject to my students. Thank you sir 😊
I am a commerce graduate works in the field of business administration. But i loved physics. I scored 100% in my 10th grade physics paper. But due to financial constraints could not pursue science stream. I have wet eyes watching your video. Thank you sir.
That last experiment was simply AWESOME!
"After watching this lecture,anyone may fall in love with physics"
what an amazing professor you are. love your lectures!!
Impressive sir , your clock started ticking at exactly the time you finished your lecture.
There is something about the way you lecture that pulls me in like gravity. Thank you.
+Roelf Vorster nice!
Audio is fine for me too.. :)
Thank you so much for the upload!
Frederikj22 Frederik I suspect that the problem is (or was) at Arnab's side.
Ur shaking head makes me feel sad.. :( may god keep u healthy forever.. ur a gem
We all will die brother.......but his lectures will remain forever.... knowledge is immortal....that makes him different from so many of us...
I love your lectures!!!
Melissa Berther I hope they do not make you cry !
Lectures by Walter Lewin. They will make you ♥ Physics. this lecture alone is viewed more than 5000 times every day. Some believe that this is my best lecture ever. ua-cam.com/video/sJG-rXBbmCc/v-deo.html
So amazing and interesting experiment ❤️👍
speaking of Gravity.. both as it affects the Earth and The moon.... Very EXCELLENT demonstrations and Explanations. I know that Tides aren't apart of this discussion.. but just a thought here, We hear about the Ocean tides.. how the water RISES... but we never hear about how the Atmosphere Above the water Rises as well. Makes you wonder if there is an Atmospheric Tide that goes around the earth...... Pardon the Diversion here.. but having taken in your lecture on Gravity and all.. I just went off on a tangent.. :) Thanks..
+Philip Y Thanks Philip. Yes, atmospheric tides do exist. en.wikipedia.org/wiki/Atmospheric_tide
He is a gift from God to us.
#Respect sir
This is Jagan Mohan from India. I'm a student of Mechanical Engineering. Learnt a lot of concepts from your lecturers. Thank you. Can you do a series on Fluid Mechanics and Basic Thermodynamics. Also can I get you mail id as I would like to send you a personal mail.
+Jagan Mohan Rao Yerra If you leave your email address here, I will contact you.
Sir I always try to be a person like you
Der rätselhafte Geistergast
gastiert sich bei dir ein
und was du bist und was du hast,
das ist nicht länger dein.
Der rätselhafte Geistergast
will mehr als nur Quartier,
sein kleiner Reisebeutel fasst
dein Herz und dein Klavier.
Der rätselhafte Geistergast,
Der nimmt dir Kopf und Leib.
Er bleibt, solange es ihm passt
und geht, wenn du sagst: Bleib.
Author: Robert Gernhardt
We know that free falling objects(without any obstracle) pass the same way in equal time. That means the velocity of two different mass are same.It means the force of Gravity works on that two objects or mass similarly. But we know that the force of gravity is one kind of gravitational force. And gravitational force depends propotionally on the mass of objects . So the force of gravity would be less or high on that two mass. But why it is not? Why the force of gravity works similarly on different mass?
1) Does the force of gravity works on free falling objects?? If it is , then why the velocity of two different mass are same while they free fall??
2) Does gravity exist in nature ??
3) What is responsible for this?? Gravity or curved space??
Ahnaf Akif
Student , Bangladesh.
Hello Professor!
If you have a fly in the airplane with you, flying at the same speed, sitting on your armrest. When the fly takes off from your armrest to the armrest of the pilot sitting up at the other end of the airplane, will it be able to make it there?
Have a great day prof!
the fly will do as well in the plane as at your home.
A fly in the ISS (18 thousand mph) will fly as easily in the ISS as at your home.
sir, my doubt is not clear. Need your help. suppose two acclerating corrdinates are accelerating in same acceleration in respect of a inertial coordinate... but those accelerating object(corrdinates) don't know that they are accelerating(as they don't know about inertial coordinate).. the thing they can only do that they could relate themselves.. now, can they distinguish that they are acclerating(only relating themselves) or any other way?? will they feel some kind force or inertia as they are acclerating?? what they will feel?? will they be stationary inertial corrdinates in respect of themselves????
google Einstein's equivalence principle.
it's about motion in a different reference scheme
Gravitational force act's from a vertical height,however,the movement of planets and the moon is orbital with which a falling object couldn't be perpendicular to the Earth's surface,do you think that gravity can be a magnitude for distant objects related to our earth?
no it cannot - read about Hubble Expansion
love you lewin
:)
Sir we have kleppner and kolenkow being followed for mechanics
Sir Is their any videos for non inertial and rotating frame of reference?
k&k is a great book! search the web for videos !!!
Sir, suppose a block is on the table and block is putting a force of ( mg) so what is g here ? . Because my teacher is saying that it is not acceleration due to gravity it is just GMe/r*2 .
In your example, think of g as having units of Newtons/kilogram, rather than m/s^2. Yes, they are algebraically identical units, but we'll get back to that later. The value of g indicates gravitational force per unit mass. Mass is a property of matter that indicates participation in the force of gravity, and gravitational field strength (g) is a property of the environment (i.e. a force field) that tells the mass what net gravitational force to experience. If no other forces act, then it would accelerate. But due to the fact that the normal force also acts, and opposes gravity, it remains at rest.
Yes, it does become an acceleration in the special case of free fall or free projectile motion, which is why N/kg is equivalent to m/s^2. This is due to the fact that gravitational mass (m in F=G*M*m/r^2) and inertial mass (m in Fnet=m*a) are two properties of matter that are a package deal. Mass cancels out of the equation, and regardless of the properties of the body in motion, it experiences the same acceleration when no other forces apply.
For the most part, g does equal G*Me/r^2 on the surface of this planet. However, this is only strictly true at the north and south poles. There is more to the story of g, when you account for the fact that A) Earth is not a perfect sphere, B) Earth is not uniform, and C) Earth is rotating, which means there is a little variation of the apparent value of g we experience across our planet's surface. The fact that Earth rotates means that some of the gravity is "used up" in causing us to rotate with it.
5:40 SAVAGE!! HAHAHAHAH
Dear Sir
You are performing the experiments with maximum perfection. How could you synchronize the falling down of Rob and firing of bullet
we use an electric circuit that removes the current through the electromagn that carries Robert at the moment that we fire the golf ball.
Much more love and respect sir !!
I wana to learn and enjoy the physics ..
I am an intermediate level student (2nd year),but I am weak in mathematics ,so you are kindly requested to recomend me mathematic book so that I can able to enjoy physics !!
Thank you!!
ask your math teacher
Unluckily sir I am from a backward area in pak..
And I tried to find out solution but I got failed.
Unluckily sir I am from a backward area in pak..
And I tried to find out solution but I got failed.
@@jehangirkhan1782 I can email you pdf files of calculus and physics book
Sr, Are you on Quora?
nope
Thanks a lot Prof. Walter. Can u please tell me the playlist of this lecture.
8.01
si tengo una turbina con una "fuerza propulsora de 2g" y esta turbina me está succionando desde el cielo de forma que yo estando en tierra tengo la turbina que me succiona en dirección al cielo¿puedo flotar? ¿Serviria para contraarrestar la fuerza G en aviones de alta velocidad de forma que la turbina succione desde el frente del avion haciendo "escapar" el aire succionado por conductos con salidas en dirección opuesta al frente del avion y así atrayendo el cuerpo del piloto en dirección contraria a la fuerza ejercida por la aceleración?, espero haber hablado correctamente
???
Él no sabe español...
I love physic
Would you kindly increase the audio level of this video a little bit..because even in the maximum it is causing problem in audibility.
Arnab Mallick Amab, I am sorry but I cannot change the sound level. Besides the sound is fine for me and for 3 other people that I have asked.
sir how can i ask u question???
will u answer of those??
Are those like legit MIT lectures on physics? cause thats like elementary physics ... Does MIT have junior high classes?
This talk was NOT for MIT students. This was for NHK TV in Japan for the general public. I gave 8 lectures for NHK. This was 1 of them
Sir please make video on Kepler's laws of planetary motion with experiments sir please humble request
Lecture 22 of 8.01
@@lecturesbywalterlewin.they9259 Thank you sir for your great support we love you sir so so much love from India sir
i am an electrical engineering student.can you recommend me some lectures..
+intamafidukduk If you already have a good background in Newtonian Mechanics, I recommend you watch all my 35 8.02x lectures first and then my 23 8.03x lecture. Make sure you also do the homework and take the exams. Homework, exams and Lecture Notes are posted below the video images.
NOOO ROBERT'S DEAD
thanks sir for your free videos, I am highly impressed by u ,could u send me your email I'd as I wanted to ask some questions and like u I have deep love for physics and pursue a teaching career.
please post questions here. Make them brief and clear and only 1 at a time
Please provide subtitle file in .srt format for every video...
+Arvind Sharma there are subtitles on all my 8.01x lectures. Also on my most popular lecture "For the Love of Physics". We are working on subtitles for 8.02x. That's all we will (can) do. Subtitling is very time-consuming and thus very expensive.
Thanks for all your effort..You are going by your words you are making all of us seeing through the equations. Thanks..
Also please provide any link to buy these small small demonstration scientific equipment's that you used in class..whole world will love to buy that.
+Arvind Sharma Browse amazon.com. They have some of the stuff I use for demos. secret top, toy gyroscope, wind hoses which excite resonances when you swing them around, rattle backs, dynamo flash lights . . . . .
But most of my demos require equipment that is quite expensive; some is also very large in size and weight.
Sir I want to dubb your videos in hindi ,, may I??🙏
Who downvoted this? I’m just wondering why 😗
hunter lewin sir