Torque: Crash Course Physics #12 

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

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

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!!

"Have you ever pulled a door open? Me too!" I love it. 1:04

I really like the way she... torque

I understood none of this. But, I feel smarter after watching this video.

The One Ring comes third, but it rules them all!

I have a degree in theoretical physics, and I just adore this series!

A science lesson with a mario box, the one ring, and a dragon ball.... I'M IN!

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 RU-vid video. Keep up the good work!

Thisvideojusttaughtmenottousespacebarwhenyouspeak.Thankyou.

as usual, it's going to take a week to assimilate and fully understand the video :)

I just spent 5 minutes of my life opening and closing my door at difference angles and lever arms

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.

now you know you should buy your future wife a box so you guys can have a smoother relationship

Thank you for helping me through my physics assignment. Great video!

"We have a box, a ring, and a marble." (Mario cube, LotR ring, and dragonball appear on ramp.) This is gonna be good.

This video feels like a huge injection of liquid physics into my brain. Thank you!

Moments of silence.. This video has none!

Love it, a very helpful accompaniment to my textbooks. Thank you Crash Course.

I'm giving Crash Course a shout out on my graduation... in 2 weeks!!

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 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.

Thanks, this was the exact problem my professor asked me about in the oral exam!

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.

The one youtube vid i look forward to all week!!! awesome

This series is so good.

I could not get through Corona virus distance learning without this. Thank you!

these physics videos are really helpful especially before my test

Very detailed explanation. Thank you!!

This helps a lot, just what I need for exam review!

that helps me a lot .GREAT THANKS for your useful videos.

this video was very helpful, thanks guys

you explained this way better than my university lecturer, good job!

Mr.Green , this kind of videos make crash course my favorite channel.

That was clear and went right in. Thanks

Great video!

Great one.

7:17 i almost had a heart attack, i sat in the libary and thought it was a school shooting lol

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

First time using crash course for physics and was expecting hank but I was pleasantly surprised the speed she talks is nice

The short video really did good job to make a brief interview of phsical knowledge.

your videos are awesome now I can understand

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!

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.

ı really liked it ! thank you very muchhhh

thanks...im finally read for my test tomorow

Thanks for helping me out with class 11 physics . Exam tomorrow

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.

Just refreshed and boom

Learning physics from Symmetra

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!!!!

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"

My head has blown up, I wanna cry, and my acne is back after watching one video

Watching at 1.5 speed because I'm a physics grad student, but I feel compelled to watch everything Crash Course puts out.

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 am really surprised how you taught that........i didn't ever felt it that easy and intresting......i must say good job

Thanks a lot mam 😊 . You are awesome

These videos are incredible. They are really helping me with my college course. Thank you! :)

I love you guys

I love all ur crash course video ! This physics is awesome.But I have a request all your physics crash course video are on class 11 topics I would be happy to have some new videos on class 12 topics

Good video

well done

Pretty and smart I think I am going to be watching more of these videos

that pyshics theme song intro gave me chills just like the philosophy one

I'll never watch LOTR the same way again.

i love you, thank you!!!!!

pandora started a dubstep song at the beginning of this video. I was so hyped on when this race started.

I love your videos! please keep it up! May I kindly suggest to take a moment to breath... hehehe the paste is so fast! :) lil breaks :))

thank you

This saved my life, thank you 🎷🐛

As a car guy, I very much appreciated that video. Solid host too

Hi this is Arwen I love Crash Course!!!!!

what a beauty

I swear to god no matter what im learning theres a crash course for it

You explained it amazingly! Thank you so much crash course now I understood the torque😍

Loved the video but in the case of the ramp, I'm pretty sure that friction between the box and ramp is kinetic, there is relative motion B/w the two surfaces..

great!!

i just subscribed beacause shini samora

i like this

This video cured my insomnia. Good morning guys.

i would love to see one of your videos about the Phoenicians

kindly also make a video on projectile motion!

It would be great to have handouts of these lessons

It was interesting listening to her torque about talk.

She is gorgeous btw.... And I love her hair 😍

For a video series that has done so well avoiding jargon, this one was just filled with it.

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

Linear momentum is the product of moment of inertia and the angular velocity if and only if the axis of rotation of that body is a principle axis

𝐓𝐨𝐫𝐪𝐮𝐞 𝐰𝐢𝐧𝐬 𝐫𝐚𝐜𝐞𝐬

perfect for review

@5:05 Should it not be "kinetical energy of rotational..." in the bottom equation ?

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.

love it

"me too!" - I died

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.