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
the key to watching these videos is to pause to think on and rewatch certain moments if you don't grasp them immediately. These videos also help in conjunction with reading or other videos. I'm here because my physics textbook didn't explain what torque was but launched into a 15 page discussion of magnetic torque
I have a back ground in this and its treating the fundamentals like its something we can just skip over. Like the units of torque are crucial to understanding torque. ITS NOT A FORCE!!! is what it tells you. As soon as you say its not a force then the question of what is it really???? can be answered. Thats when you begin to understand it.
@@gusbisbal9803 This is called CRASH COURSE FOR A REASON. SHES SUPPOSED TO HELP REVIEW THE BASIC TOPICS IF YOU WANT SOMEONE TO HOLD YOUR HAND AND WIPE YOUR NOSE FOR YOU, GO TO YOUR TEACHER OR KHAN ACADEMY
For anyone watching Crash Coures physics for the first time: Dont get tensed by watching these videos.. These videos are best for reviewing the concepts after learning the topics beforehand.. They are not recommended for anyone who wants to learn these concepts afresh.. Dont freak out after watching these videos, it's fine!!
I think you must be having at least some basic understanding of these topics.. My point is that people who want to start learning physics or those who have no background knowledge of the subject will find it extremely hard to grasp the concept.. It's a generalized view..
These courses are pretty good for brushing up on - or repeating - physics classes, but I don't think they're very useful as a introduction to the subject. I understand that you need to solve problems to get to the core of physics, but listing a bunch of equations and explain their consequences isn't going going to give most of the audience a deeper understanding (this is an assumption!). I know the course would be taught in a much slower pace, but for really interested audience with a first hands experience, this is not building a solid foundation (in my opinion). I think it should be a blog post deriving all the equations displayed in the video for those who need a solid understanding of the equations. Don't take me wrong here, but I think this would please a bigger audience than the current setup.
You may be right in some way, but in my opinion the most important thing is how cool is this vid so people like me, with no background in physics, take interest in this topics
I disagree. Most of the edutainment videos on RUclips are lacking the solid, somewhat rigorous aspect of that particular branch of science they currently teaches. These CC Physics videos do not: they have it in the form of the necessary math. The best thing about them that they serve not just as introductions, but also -as you have stated- help brushing up on previously attained knowledge, refreshing them. I'll write the exact same thing i am fond to say about this topic: if you are not interested in the nuances of mathematics, physics is propably not for you.
I actually really enjoy how this course is set up. It explains the basic concepts behind the equations so that when you go and practice the skills, you have a general idea on how to tackle them. I have to agree with the feedback others have given - you do whizz through the material. However, this medium can handle that, as you can just replay portions of the RUclips video. Keep up the good work!
I slept through a physics class one time because I was tired, they explained torque. The teacher wouldn't explain it again. It's been two years, but now I finally understand this concept. Thank you so very much.
to everyone saying that she is talking really fast.. that is because (if you haven't noticed) the channels name is called crash course and hence they have to explain topics quickly. I think that these videos are like reference materials that you can use to understand concepts quickly once you have a brief idea of the concepts.
There's an error at 6:27 the second part of the equation has KErot labeled as "kinetic energy of translational motion" instead of "kinetic energy of rotational motion"
If the ramp only allows static friction and not kinetic friction, then the box shouldn't go anywhere if it doesn't rotate. In order for the box to slide down the ramp it needs kinetic friction. Static friction would mean that the box is stationary.
I am sorry, but how would the box get down before the ball or the ring? We already assumed that the surface is frictionless and so there would be no friction force that would cause the ring, or the ball, to rotate. Therefore, there would be no loss( or transformation) of potential energy to rotational energy of either the box or the ball.
If the ramp has no kinetic friction, then there is nothing to start the rolling motion of the ball and ring, ergo they would all reach the bottom of the ramp at the same time.
I love the Elvish characters inscribed on the ring! Now I know why it's difficult to roll a ring into a fiery volcano--it's better to get someone to bite it off your hand and fall instead.
Okay, some of this stuff is a bit confusing but so much more confusing is the way teachers explain it in class. I swear i learned more in the last 10 mins than the last three weeks.
best best best best best!!!!! i could not get the chapter while reading from book but crashcourse made me understand it soooooooooooooooooo wel!!!!! thanks a lot lot
At time 5:07 there's an error in the description of the formula for kinetic energy of rotational motion, it's written translational, like the upper one.
They could've mentioned the physics of backflips, because when you jump and tuck your kness you decrease the moment of inertia of your body and you rotate faster due to conservation of angular momentum
I'm barely passing AP physics yet I pass all my Duel Credit classes with 100%+ i just- feel dumb. This video is good for reviewing before a test on Torque and Inertia.
I usually don't watch these courses until they are over, but my wife and I were bored. This was neat, I like the host. I think it's the british accent.
The ramp example is flawed. For rotational energy to be taken into account, friction must exist to make the ring/marble spin. If the object make contact with a 0 friction surface, they cannot engage in spinning, they would just slide down the ramp.
Am I the only one who thinks that Physics is too technical a subject to be adequately explained to the layman in a series like this, or am I just stupid and unable to grasp Physics?
its crash course, its basically assuming that you have either a background in the subject or are studying more than just this series. in my opinion she speaks way too quickly, each eopisode is a whole lesson, if a teacher was doing this each video would take an hour to demonstrate all the involved factors.
agreed the girl talk way to fast. Had a feeling like vertigo just because of the speed of her speech, before being able to understand the words she was saying. I,m non native in english that might have made it worse... but it's not a rap battle... slow down pretty please...
Not sure if speaking fast is a problem (and this one is pretty normal for me and I'm not even native speakers, for fast try CGP Grey channel :) ). The good thing about video is that you can always rollback to sections you didn't understand so you can learn at your own pace, it's the whole point actuallly.
for me it's too fast end of story. a good video should not have to be rewinded so you can grab the words. and the flow is definitely faster than other tutorial videos.
If the ramp is perfectly slippery, I'm wondering if the marble and ring would start rotating in the first place. As I'm picturing it in my mind, they start rotating due to the frictional force where they contact the ramp, but that force isn't there in this example (otherwise the block wouldn't slide (or at least would lose energy due to the friction)).
+Rhaegar19 no no no. The last video was an example of rolling without slipping. A frictionless ramp has infinite slip. There is no counterforce in this hypothetical example turning linear momentum into rotational momentum. Gravity does not impart spin magically. It's a linear force. It the surface friction that converts linear motion into rotational motion. That friction has been eliminated in this example. This is all just wrong.
+McGeias Everything you're saying is right, except the ramp isn't frictionless. It has static friction. Rolling objects use static friction to convert linear motion to rotation. If you don't believe me or Dr. Somara, google it for yourself.
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
I'm learning my whole semester in one day
"you know how physics loves ramps, especially hypothetical ramps" , please tell me something more true than this
passive-aggressive physicists
the key to watching these videos is to pause to think on and rewatch certain moments if you don't grasp them immediately. These videos also help in conjunction with reading or other videos. I'm here because my physics textbook didn't explain what torque was but launched into a 15 page discussion of magnetic torque
Its not that she speaks too fast, its that they expect you to have a background in this, its like a review
The jump cuts don't help either.
I have a back ground in this and its treating the fundamentals like its something we can just skip over. Like the units of torque are crucial to understanding torque. ITS NOT A FORCE!!! is what it tells you. As soon as you say its not a force then the question of what is it really???? can be answered. Thats when you begin to understand it.
@@gusbisbal9803 This is called CRASH COURSE FOR A REASON. SHES SUPPOSED TO HELP REVIEW THE BASIC TOPICS IF YOU WANT SOMEONE TO HOLD YOUR HAND AND WIPE YOUR NOSE FOR YOU, GO TO YOUR TEACHER OR KHAN ACADEMY
For anyone watching Crash Coures physics for the first time:
Dont get tensed by watching these videos.. These videos are best for reviewing the concepts after learning the topics beforehand.. They are not recommended for anyone who wants to learn these concepts afresh.. Dont freak out after watching these videos, it's fine!!
the whole point of crash courses is to get people an understanding of a subject, not to review it
@@kikumayumi9219 Exactly! And that's what disappoints most of us watching the videos..
@@shreyaprakash how so does it disappoint us, this crash course was a great help for me when I watched it
I think you must be having at least some basic understanding of these topics.. My point is that people who want to start learning physics or those who have no background knowledge of the subject will find it extremely hard to grasp the concept.. It's a generalized view..
I really like the way she... torque
HAHAHA
good one brah
OMG AHAHA. THIS SHOULD WE TOP COMMENT
yes he definitely got me xD
loool
"Have you ever pulled a door open? Me too!" I love it. 1:04
I understood none of this. But, I feel smarter after watching this video.
The One Ring comes third, but it rules them all!
...and my axe!
RISE!
I have a cock ring
A male chicken ring?
One Ring to rule them all, One Ring to find them,One Ring to bring them all and in the darkness bind them.
These courses are pretty good for brushing up on - or repeating - physics classes, but I don't think they're very useful as a introduction to the subject.
I understand that you need to solve problems to get to the core of physics, but listing a bunch of equations and explain their consequences isn't going going to give most of the audience a deeper understanding (this is an assumption!).
I know the course would be taught in a much slower pace, but for really interested audience with a first hands experience, this is not building a solid foundation (in my opinion). I think it should be a blog post deriving all the equations displayed in the video for those who need a solid understanding of the equations.
Don't take me wrong here, but I think this would please a bigger audience than the current setup.
I agree. I think it would be better if the math were mentioned for reference, but the instruction kept mostly to the conceptual.
I'm not sure how much more conceptual you can get than this...
You may be right in some way, but in my opinion the most important thing is how cool is this vid so people like me, with no background in physics, take interest in this topics
I disagree. Most of the edutainment videos on RUclips are lacking the solid, somewhat rigorous aspect of that particular branch of science they currently teaches. These CC Physics videos do not: they have it in the form of the necessary math. The best thing about them that they serve not just as introductions, but also -as you have stated- help brushing up on previously attained knowledge, refreshing them.
I'll write the exact same thing i am fond to say about this topic: if you are not interested in the nuances of mathematics, physics is propably not for you.
That's why it's called "crash course". It's not meant to be equal to an actual physics course in a school.
A science lesson with a mario box, the one ring, and a dragon ball.... I'M IN!
KingJokerRock also the ring is from 'lord of the ring'🍻🔥
@@mukundyadav4445 that's why he said "the one ring" that's what it's called
Should've used a power ring from Sonic the hedgehog. Then it would've moved faster down the ramp? 🤔 Lol
my kind of lesson
I have a degree in theoretical physics, and I just adore this series!
I actually really enjoy how this course is set up. It explains the basic concepts behind the equations so that when you go and practice the skills, you have a general idea on how to tackle them. I have to agree with the feedback others have given - you do whizz through the material. However, this medium can handle that, as you can just replay portions of the RUclips video. Keep up the good work!
I slept through a physics class one time because I was tired, they explained torque. The teacher wouldn't explain it again.
It's been two years, but now I finally understand this concept. Thank you so very much.
Thisvideojusttaughtmenottousespacebarwhenyouspeak.Thankyou.
And know I realized why my eyes had been looking at an all jumbled.
Thatsnicekeepitup
Mohammedhedidntputaspacebarbeforethankyouitsaperiodthankyouforyourtime
daveimgay
Whyutellingmethat
Moments of silence.. This video has none!
Nope, just inertia
as usual, it's going to take a week to assimilate and fully understand the video :)
same.
isn't ur face profile from an anime? I think its name is Greed?
King PufflePuff spirited away
Yeah, that's what I thought. xD
King PufflePuff its original name was No Face
now you know you should buy your future wife a box so you guys can have a smoother relationship
Don't forget to put the ring inside the box
@@davet5223 Ayyyyy
I just spent 5 minutes of my life opening and closing my door at difference angles and lever arms
This video feels like a huge injection of liquid physics into my brain. Thank you!
"We have a box, a ring, and a marble."
(Mario cube, LotR ring, and dragonball appear on ramp.) This is gonna be good.
to everyone saying that she is talking really fast.. that is because (if you haven't noticed) the channels name is called crash course and hence they have to explain topics quickly. I think that these videos are like reference materials that you can use to understand concepts quickly once you have a brief idea of the concepts.
I'm giving Crash Course a shout out on my graduation... in 2 weeks!!
There's an error at 6:27 the second part of the equation has KErot labeled as "kinetic energy of translational motion" instead of "kinetic energy of rotational motion"
Thank you for helping me through my physics assignment. Great video!
Thanks, this was the exact problem my professor asked me about in the oral exam!
She is gorgeous btw.... And I love her hair 😍
God yes
She is, not that it matter really.
stop objectifying her! she's here to teach physics!
Felds Liscia whatever, everything is relevant
go to India..they literally all look like her.:P:
7:17 i almost had a heart attack, i sat in the libary and thought it was a school shooting lol
My head has blown up, I wanna cry, and my acne is back after watching one video
Learning physics from Symmetra
I could not get through Corona virus distance learning without this. Thank you!
Watching at 1.5 speed because I'm a physics grad student, but I feel compelled to watch everything Crash Course puts out.
First time using crash course for physics and was expecting hank but I was pleasantly surprised the speed she talks is nice
If the ramp only allows static friction and not kinetic friction, then the box shouldn't go anywhere if it doesn't rotate. In order for the box to slide down the ramp it needs kinetic friction. Static friction would mean that the box is stationary.
@5:05 Should it not be "kinetical energy of rotational..." in the bottom equation ?
Im doing Marine Engineering where there is a dynamics module which I did just not understand at all, these videos are so useful.
Thanks.
I'm 13 in eight grade and I'm watching this because we have to learn about it soon. Im trying to be above everyone else!!!!
I swear to god no matter what im learning theres a crash course for it
Thanks for helping me out with class 11 physics . Exam tomorrow
This series is so good.
Love it, a very helpful accompaniment to my textbooks. Thank you Crash Course.
The one youtube vid i look forward to all week!!! awesome
I am sorry, but how would the box get down before the ball or the ring? We already assumed that the surface is frictionless and so there would be no friction force that would cause the ring, or the ball, to rotate. Therefore, there would be no loss( or transformation) of potential energy to rotational energy of either the box or the ball.
This video cured my insomnia. Good morning guys.
If the ramp has no kinetic friction, then there is nothing to start the rolling motion of the ball and ring, ergo they would all reach the bottom of the ramp at the same time.
that pyshics theme song intro gave me chills just like the philosophy one
I love the Elvish characters inscribed on the ring! Now I know why it's difficult to roll a ring into a fiery volcano--it's better to get someone to bite it off your hand and fall instead.
I'll never watch LOTR the same way again.
Mr.Green , this kind of videos make crash course my favorite channel.
At 5:05 there is a mistake in the video: it shows "translational motion" for the second line too, which shold be "rotational motion".
As a car guy, I very much appreciated that video. Solid host too
Just refreshed and boom
Hi this is Arwen I love Crash Course!!!!!
𝐓𝐨𝐫𝐪𝐮𝐞 𝐰𝐢𝐧𝐬 𝐫𝐚𝐜𝐞𝐬
This looks threatening.
Okay, some of this stuff is a bit confusing but so much more confusing is the way teachers explain it in class. I swear i learned more in the last 10 mins than the last three weeks.
best best best best best!!!!!
i could not get the chapter while reading from book but crashcourse made me understand it soooooooooooooooooo wel!!!!!
thanks a lot lot
U explaination is awesome my mind blows up
this video was very helpful, thanks guys
Maaaaaan she never stops
tourqing
these physics videos are really helpful especially before my test
Thanks a lot mam 😊 . You are awesome
That's so amazing a course!
Very detailed explanation. Thank you!!
This woman saved my life
I graduated 5 years ago, im a veterinarian, why do i enjoy learning about torque
That was clear and went right in. Thanks
kindly also make a video on projectile motion!
i like this
thanks...im finally read for my test tomorow
you explained this way better than my university lecturer, good job!
For a video series that has done so well avoiding jargon, this one was just filled with it.
These videos are incredible. They are really helping me with my college course. Thank you! :)
The short video really did good job to make a brief interview of phsical knowledge.
At time 5:07 there's an error in the description of the formula for kinetic energy of rotational motion, it's written translational, like the upper one.
If kinetic friction is not allowed, why will the marble and the ring roll instead of slide down?
At 5:06, do you mean kinetic energy of rotational motion over the KE rotational block instead of translational motion?
That’s crazy, I thought the box would be last and ring would be first since it looks like a wheels. Thanks Dr Shini Somara!
your videos are awesome now I can understand
Great video!
Good video
dont you love when Pharah is teaching you about torque
This video gets real, quick.
that helps me a lot .GREAT THANKS for your useful videos.
6:36 I don't understand why she cancels mass with the movement of inertia of marble and ring?
i am really surprised how you taught that........i didn't ever felt it that easy and intresting......i must say good job
Great one.
This helps a lot, just what I need for exam review!
They could've mentioned the physics of backflips, because when you jump and tuck your kness you decrease the moment of inertia of your body and you rotate faster due to conservation of angular momentum
I'm barely passing AP physics yet I pass all my Duel Credit classes with 100%+ i just- feel dumb. This video is good for reviewing before a test on Torque and Inertia.
This saved my life, thank you 🎷🐛
At 5:07, there is an error. The bottom part is suppose to say "rotational motion", not "translational motion".
I usually don't watch these courses until they are over, but my wife and I were bored. This was neat, I like the host. I think it's the british accent.
I think after our school new curriculum I understand a lot of what she is saying , but she is better at explaining it than my teachers 😂😂😂
The ramp example is flawed. For rotational energy to be taken into account, friction must exist to make the ring/marble spin. If the object make contact with a 0 friction surface, they cannot engage in spinning, they would just slide down the ramp.
Alex Sarullo agreed
It’s like kinetic friction works for the ring and the marble but not the box
The only topic in Physics that I actually know at least a little.
Am I the only one who thinks that Physics is too technical a subject to be adequately explained to the layman in a series like this, or am I just stupid and unable to grasp Physics?
its crash course, its basically assuming that you have either a background in the subject or are studying more than just this series. in my opinion she speaks way too quickly, each eopisode is a whole lesson, if a teacher was doing this each video would take an hour to demonstrate all the involved factors.
agreed the girl talk way to fast. Had a feeling like vertigo just because of the speed of her speech, before being able to understand the words she was saying. I,m non native in english that might have made it worse... but it's not a rap battle... slow down pretty please...
Not sure if speaking fast is a problem (and this one is pretty normal
for me and I'm not even native speakers, for fast try CGP Grey channel
:) ). The good thing about video is that you can always rollback to
sections you didn't understand so you can learn at your own pace, it's
the whole point actuallly.
for me it's too fast end of story. a good video should not have to be rewinded so you can grab the words. and the flow is definitely faster than other tutorial videos.
or are you 'grasping' for replies?
well done
If the ramp is perfectly slippery, I'm wondering if the marble and ring would start rotating in the first place. As I'm picturing it in my mind, they start rotating due to the frictional force where they contact the ramp, but that force isn't there in this example (otherwise the block wouldn't slide (or at least would lose energy due to the friction)).
Rolling objects use static friction because the point where they touch the ramp isn't actually moving (see last video).
+Rhaegar19 no no no. The last video was an example of rolling without slipping. A frictionless ramp has infinite slip. There is no counterforce in this hypothetical example turning linear momentum into rotational momentum. Gravity does not impart spin magically. It's a linear force. It the surface friction that converts linear motion into rotational motion. That friction has been eliminated in this example. This is all just wrong.
+McGeias Everything you're saying is right, except the ramp isn't frictionless. It has static friction. Rolling objects use static friction to convert linear motion to rotation. If you don't believe me or Dr. Somara, google it for yourself.
ı really liked it ! thank you very muchhhh