We made quiz questions to help you review the content in this episode! Find them on the free Crash Course App! Download it here for Apple Devices: apple.co/3d4eyZo Download it here for Android Devices: bit.ly/3TW06aP
My favorite explanation of Newtons laws comes from my high school Physics teacher: 1.) Stuff is hard to shake 2.) More stuff is harder to shake 3.) Stuff pushes back
My science teacher's explanation,(or at least I think she said this I was kinda asleep): 1.) IYUGVLJGY{YGYV:Gljewdnjqv 2.) prgwd9f3edwgytyftewdhhhhhhhhhhhhhhhhhhhhhhhgy 3.) Get out of my friggin classroom
Newton's Laws of Motion: 0:53 - First Law (Inertia): "An object in motion will remain in motion, and an object at rest will remain at rest, unless acted upon by a force." 1:37 - Second Law (Fn = ma): "Net force is equal to mass times acceleration." 3:40 - Third Law (Equilibrium): "For every action, there is an equal but opposite reaction." 4:52 - Further explanation on Normal Force and Tension Force
I've gotta say, after watching this series so far, I'm happy they have Dr Somara as the host. Her voice is nice to listen to, and her delivery of the material is engaging. I had to study basic wavelength physics in college for part of my Speech Pathology degree, and I found the course to be a bit dull. I wonder how it will be if and when they discuss it here.
The arrangement of the Rubik's Cube in this episode is still exactly identical to its arrangement from last episode. Unfortunately, this means that no one is even trying to work on it in between episodes. This just isn't right. Whenever you see an unsolved Rubik's Cube sitting around, fixing it should always be a top priority.
"Suppose you threw a 5kg ball up in the air, and then, you know, got out of the way because that could really hurt if it hits you." This is easier to understand than I thought it would be.
They don't have to teach behavior, why won't they be better. Try being a teacher for a day in your life and you will have a different perspective. I love teaching my content but I can't teach it fun when a bunch of kids are talking, arguing with each other or getting out of their seats which erupts in laughter. Once behavior is taught teaching becomes easier.
Yeah that's true, but did you understood everything she taught or may you just liked the video presentation? And understood much lesser than compared to real one.
This really is not a good video for beginners; it moves too quickly to teach anything. For someone like me just watching for fun, sure. But not useful for trying to learn the information. Also the elevator graphic uses colors that make it hard to see the different arrows and stuff they add to it.
Its basiclly a concept with which you can tell how much your weight will be on the weighing machine,based off of lifts acceleration and direction i know its a long time but hope it helps :)
SWARNA LATHA What always confuses me is that if it takes 15 Newton’s of force to lift an object off the table, how would I actually be able to lift it if the law states that it’s pulling back down with the same force? Wouldn’t it just cancel each other out?
@CrashCourse I'm loving the Physics course and they are helping me so much. You teach better than in the school I was. I'm watching many times to get every point. Thank you for sharing these knowledges with us.
I skipped a huge part of my math book that talked about this stuff. when finals came i had to learn EVERYTHING in one night. this video helped a lot much love.
Edward McDOnagh equally bad ... I'm not even sure if what those natives are talking really qualifies as a language or if it is not rather a combination of grunt louds.
How is it that I learn more in the night before a test from a woman I don't personally know than I do from my teacher! Thank you everybody at Crash Course!
Thank you for posting this!! I have been studying to get into the Navy and I am on the Physical Science chapter. I have a better understanding by watching things in motion and film, and this video has helped a lot!!! :)
The thought bubble about the hockey rink wasn't timed well. It showed constant motion when Shini was talking about acceleration, and stopped the puck when Shini was talking about equilibrium. This might really confuse people who are learning this for the first time.
Most interesting video so far. It's nice to see the notions/concepts build up piece by piece. Still, so many ways to describe the same "event" and it's all down to mathematics.
This is wonderful! I was waiting for this for such a long time.. Could you do some videos about electronics and stuff like that? Keep up the good work!
Newton's 4th Law of Motion - "A Rubik's cube at unsolved position will continue to be in unsolved position unless it is acted upon by a external effort to change its state of being."
I love learning in my free time. Thanks for the videos! I'm about to start college, and these videos have definitely helped refresh my memory about what I've learned in high school while keeping me entertained by presenting new additional info.
@@swarnalatha5242 None taken, lol, schools here aren't great. Once got a bad grade on my trigonometry final in highschool, went back and checked, and some of the test answers were actually wrong. My teacher corrected it after - thankfully, she wasn't the type to outright ignore constructive criticism like some teachers.
Eeeeeh, I have an issue with how you describe the reason that the action and reaction forces don't cancel out. It is less about the difference between the sleigh vs the force on the ground and more about the fact that the forces are acting on different objects. Consider an astronaut pushing another astronaut in the depth of space. Each astronaut experiences an equal and opposite force, and there are NO OTHER FORCES acting on them, yet they still accelerate. Why? Because while the forces are equal and opposite, they are acting on _different objects_. You can pick up the mug, in spite of the equal and opposite reaction force, because the reaction force isn't acting on the same object. If force 1 is on object A, and force 2 is on object B, the fact that they're equal and opposite is irrelevant. They can't cancel if they're acting on different objects. The action force is object A acting on object B, the reaction is object B acting on object A. Each of these forces is free to induce acceleration on their respective objects.
I don't see how what she said contradicts what she said given that she specified what object each force was acting on. And why would anyone think 2 separate forces acting on 2 objects would effect each other.
Remember the PBS show "Mechanical Universe" in the 70s? They also did the moving parts of the equation. But they had little starbursts when factors canceled each other out.
+IAintGivinOutMyRealNameOn UA-cam Maybe, but it's this series's thematic ancestor. Early computer graphics and demonstrations. I loved it. This lecturer had this huge notebook and you could see the progress he made from beginning to end.
@@swarnalatha5242Lol I never said this was only taught in Engineering. These are the basic laws of movement/force. And used to form equations in 3D space with vectors, with advanced calculus, in Static and Dynamic physics in Engineering. What I was saying was, when I see any basic physics, I always think back to these courses. And also Relativity and Quantum physics. Which I dont even think is mandatory to take anymore where Im from, for Civil Eng at the Uni I was at, but that was 12 years ago 🤷♀️.. Idk why u assume Im lying 🤦♀️
Gosh i think I learn more in UA-cam than my teacher's stuffs thinks that she knows too much while she was fooling us around"LOVE U YOU TUBE TEACHERS"got to understand alot
Well I was like, "Let me watch some easy physics to procrastinate for this physics exam today". Then I realized how much basic physics I've forgotten... Well now I know why people hate physics so much...
My physics finals (matriculation examination) got rescheduled and now they're a week earlier than they were supposed to be because of the CODVID-19 panic. Help me CrashCourse, you're my only hope!
It's my first time checking out the physics crash course and Shini does a great job. Some of the other people get a little too hyperactive and confusing. This was perfect.
These videos are pretty helpful so far, but the timing was honestly bad, you guys should've started earlier since that the AP Physics exam will be next week.
+Perseides Why? They often provide an interesting alternative approach that can help people with their understanding. The Astronomy crash course covered concepts last year up to end of undergrad level, just with less mathematics.
+Perseides It's definitely not the only resource that I would use for studying and AP course, but it would've been useful when I first started taking the course. I personally like to use simple videos to recap all topics.
At 8:23, isn't the force of tension the same as the force of gravity on the counterweight ? I mean Ft = m(c).g It's Just the only thing that i don't understand.
Who needs notebooks when you have CrashCourse? I have a test on this in 4 days but I don't even look at what we have learned in class, I don't need it, I got Shini
This is a really odd way of handling the weight-counterweight example, considering the forces are linked. Gravity pulls both the weight and counterweight "down" with the same force while the lift and counterweight pull each other up by their own weight. Basically, the force acting on the lift is its own mass * gravity - the counterweight's mass times gravity, isn't it? All the rope and pully system does (assuming no stretching or friction) is to redirect the counterweight's weight up relative to the lift's weight, almost as though it were attached to a balloon, instead. I've done calculus and analytical physics in the university and your approach to jamming everything in the same colossal equation still confuses me greatly. It just seems so much simpler to take the maths step by step in what I presume is intended to be an introductory course in physics for people who haven't already studied physics. There are simpler ways to explain this.
+Malidictus I really get your point but I think the idea is to quickly discribe the math with out it bogging down the physics although the math is the physics so... ?
Jose Hernandez The problem, though, is it becomes a little bit TOO quick. Like I said - I'm able to follow reasonably fine, but I took analytical physics at the university. I already know this stuff. For someone walking into this Crash Course from a non-mathematical background, all of this would be terribly confusing. You can only do so much in a 10-minute video, I grant you this much, but I'd personally cut out some of the pictorial examples if it meant making the equations more accessible. In my experience, simply giving people an equation and saying "Right, this is how you do this!" just ends up being confusing. If you don't know the "why" behind mathematics, it really does sound like alien science.
+CrashCourse Great video Chrash; however, I can't wait to see your up-coming video on relativity where we learn that gravity isn't actually a force but the curvature of space-time.
gosh gravity is still a force, its one of the fundamentals, you can describe all other forces as well with curvature, its just very practical to do this for gravity since its the most obvious force on large scales
Jose Hernandez yeah but be honest. Can you really IMAGINE the curvature of spacetime? Its hard right? Because we only see the effects of it. But i am not hundert percent sure if the other forces can be described with curvature, but i know that electromagnetic wormholes are possible.
I have a question. Way back in my high school physics class, we had a substitute teacher one day, and he asked if anyone could tell him what momentum was. So I said it was a measurement of inertia. He said he supposed that was right, but he was looking for the p=mv equation. I never really was confident in my answer; is it in fact accurate to think of momentum as a measurement of inertia?
Inertia is an object's resistance to changes in motion. It is an idea, not a quantity. Inertia is most closely related to mass. Momentum is the product of mass and velocity. It is a related but different quantity than just mass.
Mr. Poopybutthole I didn't say inertia and momentum were equivalent. I said momentum is *a measure* of inertia. Kind of how meters and length aren't equivalent, but meters are a measure of length.
Momentum is not the measure of inertia since inertia is independent of the velocity of the body and is mathematically equivalent to mass. Momentum however depends on the velocity of the body. So if two objects having same mass are moving with different velocities, their inertia will be same since masses are equal but momentum will be different. The idea of momentum was introduced for the calculation of force since rate of change of momentum is directly proportional to applied force.
Syed Shahabuddin Ah, okay, that does make sense...but does that mean that light doesn't have any inertia, since it has no mass (even though it does have momentum)?
+IceMetalPunk You could say that mass is the measure for inertia. Light is a special case because using the classical equation p=mv for momentum light shouldn't have momentum either. In relativity momentum is defined differently.
We (my class) got told that Newtons 1st law is “an object will remain at rest or continue travelling in a straight line unless acted upon by a unbalanced force” the second was simply “f=ma” and third was “if A exerts a force on B, then B will exert an equal and opposite force on A”
3:40 - "...which is explained by Newton's third law... that's what we call the normal force." ...what? No, it isn't. Where gravity's concerned, the reaction force is the Earth being pulled. I'm not totally sure what the normal force's reaction is - I think it has to do with the stress on different parts of the object - but I know that when it comes to gravity, the reaction will always be the force on the other body, and the fact that the normal force is also equal and opposite in this case is a consequence of the fact we're considering a stationary object, not Newton's third law.
the normal reaction force actually comes from a few things, one of them being the electrostatic repulsion of the electrons in the outer shells of the atoms that make up the objects. If you think of the electrons with their like charges as similar to like poles of a magnet, you can see how this causes a reactionary force. The harder you push the magnet, the harder the magnet pushes back.
+IoEstasCedonta You are correct. The action of "Earth pulling on the object" is equal to the reaction of "The object pulling on the Earth". In case of the Normal Force, the action of "The total electric/ other quantum phenomena repulsion by the electrons on the outer shell of the object toward the table" is equal to "The total repulsion by the table towards the object" both generating from being too close in the microscopic level. For an object resting on the table, the forces on the first group equals the forces on the second group, hence both forces on the object cancels out. If it didn't, the object will break through the table. Newtons law is also valid for a falling object, where there is no table to oppose the gravity. In that case, the force on the object is equal to the attraction force on earth by the object. But the net force on the object do not cancel out.
Okay, so Newton went and stopped a cow and got his first law: An object continues to be in a state of rest or motion unless acted upon. Then he gave the cow a little bit of force and then the cow said 'Ma' and so F = Ma Then he kicked the cow and here comes the third law. The cow kicked him back. This is how I remembered these laws.
Wow, I love that you're teaching this a million times better than my physics course at uni, for free! Thank you so much. I thought it was impossible to understand physics until these videos. I just wish I'd watched them much sooner! Also, off topic, but what do you do to get your hair so shiny and healthy? I have some major hair envy and can't stop admiring yours!
We made quiz questions to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: apple.co/3d4eyZo
Download it here for Android Devices: bit.ly/3TW06aP
My favorite explanation of Newtons laws comes from my high school Physics teacher:
1.) Stuff is hard to shake
2.) More stuff is harder to shake
3.) Stuff pushes back
My science teacher's explanation,(or at least I think she said this I was kinda asleep):
1.) IYUGVLJGY{YGYV:Gljewdnjqv
2.) prgwd9f3edwgytyftewdhhhhhhhhhhhhhhhhhhhhhhhgy
3.) Get out of my friggin classroom
@@Bloxicorn What ur teacher was probably saying
1 (explain things )
2 sees u sleeping says get up Mr or u getting out of my classroom
3 kicks u out
I'm a better man 5 months later. I do not sleep. At all.
@@Bloxicorn My science teachers explaination
1.) Your
2.) Mom
3.) Gay
You are high school and you are learning this now?
A student in bed will remain in bed until acted upon by a large enough panic : The lesser known Newton's 4th Law.
HAHAHA a sense of urgency.
+LelWut
Urgency or a nagging mom 😂
+Kamal Bhamra Happy the Student he who like river, can follow his course without leaving his bed.
+Kamal Bhamra lmao
+Kamal Bhamra I always remind my professors about that one when they mention Newton's laws.
"Now the normal force isn't like most other forces. It's special."
so much for normal.
+
Amy Samuels Poor normal force always being ignored at surface..
Normaw*
"I'm not like other forces"
ShaleyGerman "I'm... Normal"
When your physics final is tomorrow and you tryna learn everything the night before... 😂😂😂
Or the morning of lol
Thats me bro tbh
so how did you do? I hope good !!
Vika S omg thats me rn wth
Vika S sameeee!!!
"There will be no Christmas without physics"
*Reindeer flies with sleigh*
(Defies physics)
The the universe cannot be as we know it without Physics.
Newton slaps top of car. Car slaps newton back. Equal and opposite force!
It would also be an unbalanced force
Isabella Fetter wait what? Ohh I remember!
I don't think there were cars back then
If there wasnt a opposite force the hand would go trough the car:) The pain and sudden stop is feeling of the opposite force
@@ddharsh2548 it was a joke. You just got wooooshed
Newton's Laws of Motion:
0:53 - First Law (Inertia): "An object in motion will remain in motion, and an object at rest will remain at rest, unless acted upon by a force."
1:37 - Second Law (Fn = ma): "Net force is equal to mass times acceleration."
3:40 - Third Law (Equilibrium): "For every action, there is an equal but opposite reaction."
4:52 - Further explanation on Normal Force and Tension Force
I've gotta say, after watching this series so far, I'm happy they have Dr Somara as the host. Her voice is nice to listen to, and her delivery of the material is engaging. I had to study basic wavelength physics in college for part of my Speech Pathology degree, and I found the course to be a bit dull. I wonder how it will be if and when they discuss it here.
The arrangement of the Rubik's Cube in this episode is still exactly identical to its arrangement from last episode. Unfortunately, this means that no one is even trying to work on it in between episodes. This just isn't right. Whenever you see an unsolved Rubik's Cube sitting around, fixing it should always be a top priority.
it's not that hard to solve a Rubik's cube and solvers generally like the unsolved version better than the solved position
+Pokemonix Aditya The need for order being outweighed by the need for novelty.
feitocomfruta well Tetris players I cannot help but neglect the cube as it's perfect in its own way perfection is non existing word after all
I disagree. I always have 2 cubes lying on my desk and if I ever find them unsolved, I rush to it. Can't stand it being scrambled.
Its probably only their for decoration LOL!
"Suppose you threw a 5kg ball up in the air, and then, you know, got out of the way because that could really hurt if it hits you."
This is easier to understand than I thought it would be.
I can tell im going to watch this video at least 3 more times
No
Aaron Gould me too
Same
Nice
This is my 4th time watching.....
Stop scrolling through the comments and actually listen to the dang video
I actually know all this stuff... Why am I here again? UA-cam, everybody. UA-cam....
lol right? this is all common sense if you like legos.
hiiii darling
Josh G no.
caught me
5:01 just completely clarifies my confusions in physics after 5 years.
👍
+yrjosmiel73 SOOO True, I always wondered why we could move things if everything applies the same amount of force back.
+yrjosmiel73 OHHHHHHHHHHHHHHHHHHHH!!!!!
She's hot
....
these crash course people are great teachers! much better than the ones in my personal experiences at least...
Apatheism so true
They don't have to teach behavior, why won't they be better. Try being a teacher for a day in your life and you will have a different perspective.
I love teaching my content but I can't teach it fun when a bunch of kids are talking, arguing with each other or getting out of their seats which erupts in laughter.
Once behavior is taught teaching becomes easier.
Yeah that's true, but did you understood everything she taught or may you just liked the video presentation? And understood much lesser than compared to real one.
regular teachers can be trash...
Same! there way better than class teaches
I have this weird habit where I like to watch all these education physics videos after a physic exam....why....
hahaha I do that too
+Jazlyn Natalie I do
Hahahha yeah XD
to know what u'r missing?
haha me too bro
I cant focus on the video because of my habit reading the comments while watching😂
"And for that we're gonna turn to a physicist you've probably heard of"
Me: BILL NYE THE SCIE....Oh.
@Merwin D'Souza I'M CALLING THE FBI PREPARE TO HAVE YOUR VODKA TAKEN!
SCIENCE RULES!
I was getting it until the elevator thing ...
This really is not a good video for beginners; it moves too quickly to teach anything. For someone like me just watching for fun, sure. But not useful for trying to learn the information. Also the elevator graphic uses colors that make it hard to see the different arrows and stuff they add to it.
omg same that's why i'm scrolling down here
Its basiclly a concept with which you can tell how much your weight will be on the weighing machine,based off of lifts acceleration and direction i know its a long time but hope it helps :)
SWARNA LATHA What always confuses me is that if it takes 15 Newton’s of force to lift an object off the table, how would I actually be able to lift it if the law states that it’s pulling back down with the same force? Wouldn’t it just cancel each other out?
@@Sinnbad21 thats where u r getting it wrong. The newtons 3rd law is applivable only for push not for pull.
@CrashCourse I'm loving the Physics course and they are helping me so much. You teach better than in the school I was. I'm watching many times to get every point. Thank you for sharing these knowledges with us.
Sis what she is teaching is 6th grade stuff and if you are watching it again to get every point i am sorry you are just dumb
Sir Isaac Newton: For every action, there is an equal opposite reaction
Hamilton fans: *screams in 13 different languages*
Thanks to Hamilton our cabinet's fractured into factions..... Hehehehe
when corona makes you watch these videos.
bruh?
Funny thing is that I’m actually here for a class during quarantine so you’re not wrong
@@aidenschwerdtfeger6104 ditto
People just want to bring up Corona to bad cus it another way to get alot of likes
@@Deneirioo that's pretty cool my guy!
I love her accent, not gonna lie. Especially how she says equilibrium :3
Same
And she is an Indian
uhhhhhhhhhhh
BRA!!!!!!
@@adityamunimala4885 xd australian nationality
Thank you for taking the time to make these videos. I'm having a terrible time with my current professor and this has already helped! Godspeed!
Have a physics midterm tomorrow. Hopefully these help
same
Matt DeWolfe I have physics nest semester, just practicing.
How did it go guys?
I skipped a huge part of my math book that talked about this stuff. when finals came i had to learn EVERYTHING in one night.
this video helped a lot much love.
So you are saying ur exam was soo trash that a 10 min video could ans everything?
@@swarnalatha5242 yes thats exactly what im saying. and also this video explains it fast and detailed enough
Why would you skip so much
@@trendteaser9333 we get too choose what to study first. i skipped the first lesson which was newtons law and kinda forgot about it
@@gomeezzzzz5213 doesn't the teacher tell everyone the same lesson?
British accents give me joy whenever I hear them, bless the British.
+lightsier
Ever experienced Cockney ?
+Frank Schneider or scouse
Edward McDOnagh
equally bad ... I'm not even sure if what those natives are talking really qualifies as a language or if it is not rather a combination of grunt louds.
Loud, strangely high pitched grunts
Edward McDOnagh
Are they also wearing bones in their nose ?
I've learned more in this video than in my physics class all year.
My physics final is tomorrow. Wish me luck, I'm going to need it lmao
5:52
The teacher says: There would be no Christmas without physics.
Me: Why he doesn't put a flying reindeer?
How is it that I learn more in the night before a test from a woman I don't personally know than I do from my teacher! Thank you everybody at Crash Course!
Thank you for posting this!! I have been studying to get into the Navy and I am on the Physical Science chapter. I have a better understanding by watching things in motion and film, and this video has helped a lot!!! :)
Her:no Christmas without physics
Santa: are you sure about that
The thought bubble about the hockey rink wasn't timed well. It showed constant motion when Shini was talking about acceleration, and stopped the puck when Shini was talking about equilibrium. This might really confuse people who are learning this for the first time.
FirstRisingSouI oh wait wat
Thanks for the upload!
I'd like to see more of Shini, her accent is wonderful to listen to, she has a beautiful smile and she holds attention well
Most interesting video so far. It's nice to see the notions/concepts build up piece by piece.
Still, so many ways to describe the same "event" and it's all down to mathematics.
This is wonderful! I was waiting for this for such a long time.. Could you do some videos about electronics and stuff like that? Keep up the good work!
Hey Shini! I'm having my physics exam tomorrow and these videos really help! Keep going! 😊
Newton's 4th Law of Motion - "A Rubik's cube at unsolved position will continue to be in unsolved position unless it is acted upon by a external effort to change its state of being."
I love learning in my free time. Thanks for the videos! I'm about to start college, and these videos have definitely helped refresh my memory about what I've learned in high school while keeping me entertained by presenting new additional info.
I also love the graphics because I learn best visually. Thanks again!
Excuse me? This is taught in 6th grade
@@swarnalatha5242 not in detail where I live.
@@Iffyish kk no offence though
@@swarnalatha5242 None taken, lol, schools here aren't great. Once got a bad grade on my trigonometry final in highschool, went back and checked, and some of the test answers were actually wrong. My teacher corrected it after - thankfully, she wasn't the type to outright ignore constructive criticism like some teachers.
1:25, I know this is a serious topic, but I just found it funny.
Newtons 4th law of motion: every book will be covered in dust unless and until and exteral exam acts on it😂😂
Eeeeeh, I have an issue with how you describe the reason that the action and reaction forces don't cancel out.
It is less about the difference between the sleigh vs the force on the ground and more about the fact that the forces are acting on different objects. Consider an astronaut pushing another astronaut in the depth of space. Each astronaut experiences an equal and opposite force, and there are NO OTHER FORCES acting on them, yet they still accelerate. Why? Because while the forces are equal and opposite, they are acting on _different objects_.
You can pick up the mug, in spite of the equal and opposite reaction force, because the reaction force isn't acting on the same object. If force 1 is on object A, and force 2 is on object B, the fact that they're equal and opposite is irrelevant. They can't cancel if they're acting on different objects. The action force is object A acting on object B, the reaction is object B acting on object A. Each of these forces is free to induce acceleration on their respective objects.
Jason Heavensrun thank you very much for the explanation
I don't see how what she said contradicts what she said given that she specified what object each force was acting on. And why would anyone think 2 separate forces acting on 2 objects would effect each other.
that's exactly what she said, except you sound stupid.
Ur words aren't even over in the keypad lady you type so much
Jason Heavensrun thanks for the answers to my physics quiz XD
Remember the PBS show "Mechanical Universe" in the 70s? They also did the moving parts of the equation. But they had little starbursts when factors canceled each other out.
80's*
Thats such an obscure reference
+IAintGivinOutMyRealNameOn UA-cam Maybe, but it's this series's thematic ancestor. Early computer graphics and demonstrations. I loved it. This lecturer had this huge notebook and you could see the progress he made from beginning to end.
glleg
The quality of your videos are amazing, and also interesting! Thank you.
At 1:23 I was dying of laughter 😂😭 I was watching this in class (everyone) and was the only one that was laughing .
Thanks for being a grade teacher. My irl teacher can’t teach.
I am in 6th grade btw 😊
"There will be no Christmas, without Physics "😄
8:32 isnt that Newton's Second law?
Sure is, good catch
+Science Power I didnt notice, because as I watch this, I start spacing out on memories from studying Engineering Haha 😄
@@cajuniky sis this is taught in 6th grade not in engineering atleast speak a beliveable lie
@@swarnalatha5242Lol
I never said this was only taught in Engineering. These are the basic laws of movement/force. And used to form equations in 3D space with vectors, with advanced calculus, in Static and Dynamic physics in Engineering. What I was saying was, when I see any basic physics, I always think back to these courses. And also Relativity and Quantum physics. Which I dont even think is mandatory to take anymore where Im from, for Civil Eng at the Uni I was at, but that was 12 years ago 🤷♀️.. Idk why u assume Im lying 🤦♀️
this genuinely might be the only reason i pass physics, thankyou so so much!!
when you have a science test tomorrow and forgot to study
Legit me now
I will never forget “Every action has an equal opposite reaction” thanks to Hamilton but at the same time i will never not sing that line.
There would be no christmas without physics.
*Holds up a finger*
...
*Slowly pulls it back*
Gosh i think I learn more in UA-cam than my teacher's stuffs thinks that she knows too much while she was fooling us around"LOVE U YOU TUBE TEACHERS"got to understand alot
i love these ppl on this channel sm they give me hope in my school life
I like how this is posted for me to revise for my physics test next week. Good timing!
Well I was like, "Let me watch some easy physics to procrastinate for this physics exam today". Then I realized how much basic physics I've forgotten... Well now I know why people hate physics so much...
special appearance:professor Feynman!!!
Crash Course Engineering Next !?!?!?
Sam Duke Its happening!
Bruh this is all 6th grade stuff
I just like how she is explaining physics with such a smiling face i start loving phy but my finals r near i should have discover this early
My physics finals (matriculation examination) got rescheduled and now they're a week earlier than they were supposed to be because of the CODVID-19 panic. Help me CrashCourse, you're my only hope!
Thank god! My class 10th boards are over. Two exams which were optional, got cancelled due to that idiotic disease. Break a leg!!
It's my first time checking out the physics crash course and Shini does a great job. Some of the other people get a little too hyperactive and confusing. This was perfect.
These videos are pretty helpful so far, but the timing was honestly bad, you guys should've started earlier since that the AP Physics exam will be next week.
+Dina K. Because of weird American laws, I think taxes influence when seasons on CrashCourse starts and ends
+Dina K. You're in serious trouble if u use crash course as ur study guide.
+Perseides Why? They often provide an interesting alternative approach that can help people with their understanding. The Astronomy crash course covered concepts last year up to end of undergrad level, just with less mathematics.
+Perseides It's definitely not the only resource that I would use for studying and AP course, but it would've been useful when I first started taking the course. I personally like to use simple videos to recap all topics.
I already had my mid term on first year mechanics.
Would have been helpful like 2-3 months ago.
G in Olevels = 10m/s
G in ALEVELs = 9.81 m/s
No Christmas without physics...I-
yesss her videos are getting so much better! great explaining! great visuals!
Yeah, the first couple were a bit rocky but they've improving the pacing and explanations a lot.
When you sleep in class, so you end up watching this at night trying to do homework
newtons 3rd law example: a gun fires, there is a recoil
This video cleared up a lot of things for me! Thank you for making this show!
I forget the whole thing. My rise was approximately at the beginning. What a remarkable creature. So well spoken.
If there's no Christmas without Physics, does that make David Tennant Santa?
At 8:23, isn't the force of tension the same as the force of gravity on the counterweight ?
I mean Ft = m(c).g
It's Just the only thing that i don't understand.
A cookie is just a cookie, but a Newton is cake.
A delicious one ;3
Don't forget his brother, Fig.
soslothful LOL xD
Who needs notebooks when you have CrashCourse?
I have a test on this in 4 days but I don't even look at what we have learned in class, I don't need it, I got Shini
these videos are great and all but I really just enjoy listening to her talk
this was rlly useful I hopefully I will ace my physics force test cause its today
Thank you for being such a great teacher I hope you keep on making greater videos
This is a really odd way of handling the weight-counterweight example, considering the forces are linked. Gravity pulls both the weight and counterweight "down" with the same force while the lift and counterweight pull each other up by their own weight. Basically, the force acting on the lift is its own mass * gravity - the counterweight's mass times gravity, isn't it? All the rope and pully system does (assuming no stretching or friction) is to redirect the counterweight's weight up relative to the lift's weight, almost as though it were attached to a balloon, instead.
I've done calculus and analytical physics in the university and your approach to jamming everything in the same colossal equation still confuses me greatly. It just seems so much simpler to take the maths step by step in what I presume is intended to be an introductory course in physics for people who haven't already studied physics. There are simpler ways to explain this.
+Malidictus I really get your point but I think the idea is to quickly discribe the math with out it bogging down the physics although the math is the physics so... ?
I think they should have taken DOWN as positive... it would have been easy for solving and understanding...
Jose Hernandez
The problem, though, is it becomes a little bit TOO quick. Like I said - I'm able to follow reasonably fine, but I took analytical physics at the university. I already know this stuff. For someone walking into this Crash Course from a non-mathematical background, all of this would be terribly confusing.
You can only do so much in a 10-minute video, I grant you this much, but I'd personally cut out some of the pictorial examples if it meant making the equations more accessible. In my experience, simply giving people an equation and saying "Right, this is how you do this!" just ends up being confusing.
If you don't know the "why" behind mathematics, it really does sound like alien science.
@@Malidictus it doesn't. If you understand fractions, you can understand this video. Stop being such an "intellectual" douche .
thank you so much for making this wonderful video free!!
Got an Ap Physics Exam today and I decide to watch these the morning of
One does not simply "Throw" a 5kg bowling ball...
0:40 Snake? Solid Snake? Man, I did not expect to see him during Physics class.
In before thumbnail.
Same
Same
+superj1e2z6 yep
+superj1e2z6 Same
Yep
love these vids, helping me through college one at a time! thanks for all that you folk at crash course do!
Thank you for this video! It helped sooo much, I'm a fifth grader trying to learn the order.
+CrashCourse
Great video Chrash; however, I can't wait to see your up-coming video on relativity where we learn that gravity isn't actually a force but the curvature of space-time.
That would probably episode 1000. That's not really basic stuff
+nyyght7 25 episode i guess
gosh gravity is still a force, its one of the fundamentals, you can describe all other forces as well with curvature, its just very practical to do this for gravity since its the most obvious force on large scales
+Richtiger Kevin I was thinking the same thing but I can't really think of what the other forces are curveing
Jose Hernandez yeah but be honest. Can you really IMAGINE the curvature of spacetime? Its hard right? Because we only see the effects of it.
But i am not hundert percent sure if the other forces can be described with curvature, but i know that electromagnetic wormholes are possible.
I laughed so hard when the lady got hit by that bowling ball😂
I have a question. Way back in my high school physics class, we had a substitute teacher one day, and he asked if anyone could tell him what momentum was. So I said it was a measurement of inertia. He said he supposed that was right, but he was looking for the p=mv equation. I never really was confident in my answer; is it in fact accurate to think of momentum as a measurement of inertia?
Inertia is an object's resistance to changes in motion. It is an idea, not a quantity. Inertia is most closely related to mass. Momentum is the product of mass and velocity. It is a related but different quantity than just mass.
Mr. Poopybutthole
I didn't say inertia and momentum were equivalent. I said momentum is *a measure* of inertia. Kind of how meters and length aren't equivalent, but meters are a measure of length.
Momentum is not the measure of inertia since inertia is independent of the velocity of the body and is mathematically equivalent to mass. Momentum however depends on the velocity of the body. So if two objects having same mass are moving with different velocities, their inertia will be same since masses are equal but momentum will be different. The idea of momentum was introduced for the calculation of force since rate of change of momentum is directly proportional to applied force.
Syed Shahabuddin
Ah, okay, that does make sense...but does that mean that light doesn't have any inertia, since it has no mass (even though it does have momentum)?
+IceMetalPunk You could say that mass is the measure for inertia. Light is a special case because using the classical equation p=mv for momentum light shouldn't have momentum either. In relativity momentum is defined differently.
We (my class) got told that Newtons 1st law is “an object will remain at rest or continue travelling in a straight line unless acted upon by a unbalanced force” the second was simply “f=ma” and third was “if A exerts a force on B, then B will exert an equal and opposite force on A”
Thank you for helping me out! I really understand now because of you miss ❤
3:40 - "...which is explained by Newton's third law... that's what we call the normal force."
...what? No, it isn't. Where gravity's concerned, the reaction force is the Earth being pulled. I'm not totally sure what the normal force's reaction is - I think it has to do with the stress on different parts of the object - but I know that when it comes to gravity, the reaction will always be the force on the other body, and the fact that the normal force is also equal and opposite in this case is a consequence of the fact we're considering a stationary object, not Newton's third law.
+IoEstasCedonta I'm not sure what your talking about. it sounded fine to me. i recall the same thing from my AP physics class a few years ago.
the normal reaction force actually comes from a few things, one of them being the electrostatic repulsion of the electrons in the outer shells of the atoms that make up the objects. If you think of the electrons with their like charges as similar to like poles of a magnet, you can see how this causes a reactionary force. The harder you push the magnet, the harder the magnet pushes back.
+IoEstasCedonta You are correct. The action of "Earth pulling on the object" is equal to the reaction of "The object pulling on the Earth".
In case of the Normal Force, the action of "The total electric/ other quantum phenomena repulsion by the electrons on the outer shell of the object toward the table" is equal to "The total repulsion by the table towards the object" both generating from being too close in the microscopic level.
For an object resting on the table, the forces on the first group equals the forces on the second group, hence both forces on the object cancels out. If it didn't, the object will break through the table.
Newtons law is also valid for a falling object, where there is no table to oppose the gravity. In that case, the force on the object is equal to the attraction force on earth by the object. But the net force on the object do not cancel out.
I'm in love with Shini!
My test is tmrw 😂😂🤣I never studied! I'm lost! Why do I have this class? 😪
Okay, this is the first explanation of normal force that makes sense to me. Thank you!
I really like watching these before the lecture on the topic.
Elevator > Lift. Elevators change your elevation. Lift should only go upward.
They lift you upward at a negative speed
+Mr. Poopybutthole mind = blown
where can I get a lift straight to heaven?
They lift you above the air in the elevator shaft? hehe jk your comment was funny
Robert Stiffler speed can never be negative
"F"ull = "M"etal "A"lchemist
no
:9
Okay, so Newton went and stopped a cow and got his first law: An object continues to be in a state of rest or motion unless acted upon.
Then he gave the cow a little bit of force and then the cow said 'Ma' and so F = Ma
Then he kicked the cow and here comes the third law.
The cow kicked him back.
This is how I remembered these laws.
Excellent presentation. Thanks for being more organized and slowing down the talking.
Wow, I love that you're teaching this a million times better than my physics course at uni, for free! Thank you so much. I thought it was impossible to understand physics until these videos. I just wish I'd watched them much sooner!
Also, off topic, but what do you do to get your hair so shiny and healthy? I have some major hair envy and can't stop admiring yours!
wierdo