Torque, Levers, and the Universal Law of Rotation

[@EugeneKhutoryansky]

To see subtitles in other languages: Click on the gear symbol under the video, then click on "subtitles." Then select the language (You may need to scroll up and down to see all the languages available). --To change subtitle appearance: Scroll to the top of the language selection window and click "options." In the options window you can, for example, choose a different font color and background color, and set the "background opacity" to 100% to help make the subtitles more readable. --To turn the subtitles "on" or "off" altogether: Click the "CC" button under the video. --If you believe that the translation in the subtitles can be improved, please send me an email.

[@webgpu]

1:39 shadows obey the "reversed" law of rotation :)

[@simon6071]

!6:33 "Both the momentum and angular momentum of the entire universe as a whole is always constant." Newton's third law of motion states that when one object exerts a force on a second object, that second object exerts a force that is equal in magnitude and opposite in direction on the first object. That means vectors of momentum are always created in pairs of the same magnitude but in opposite directions. As a result the net momentum created is always equal to zero. Therefore, due to the Law of Conservation of Momentum and Newton's third law of motion, both the linear momentum and angular momentum of the entire universe as a whole must be equal to zero. That means the entire universe cannot have a net spin in any direction and cannot have a net linear motion in any direction. Nothing outside the universe can change the linear momentum and angular momentum of the entire universe from zero to another value because something that can change the momentum of any part of the universe must be part of the entire universe by definition and that something must also obey the Law of Conservation of Momentum and Newton's third law of motion.

[@nicholasgonzalez]

Hey Eugene, I would just like to say that you are a very talented person and for the effort that must go into making your videos you deserve a lot more views and subscribers.

[@EugeneKhutoryansky]

Nicholas Gonzalez Thanks for the compliment.

[@blamethesocialmedia5871]

I think people just don't care about science like they should. I feel quite alone here in the south.....

[@cliffordwilliams9597]

I agree! I am astounded by the clarity of presentation, cleanliness of animation, and relatively low views/subs....Someone should help this channel reach the audience it deserves !!

[@elephantintheroom8360]

These videos are like a super advanced alien race has decided to come and teach us the nature of reality, step by step, gently and nicely. Thank you :)

[@EugeneKhutoryansky]

Thanks for the compliment about my videos.

[@autf2_6]

@@EugeneKhutoryansky hey what's up please add Turkish subtitle

[@MichaelHarrisIreland]

Your videos are absolutely brilliant and totally necessary for the general public who can't all be scientists but really want to understand the concepts. I can get used to the terms of angular momentum and many others and still have time for other things and to think.

[@EugeneKhutoryansky]

+Michael Harris, thanks for the compliment about my videos. I am glad you like them.

[@EugeneKhutoryansky]

In case, you have not already seen them, I also uploaded several other videos recently. As always, for each video that you like, you can help more people find it in their KZbin search engine by clicking the like button, and writing a comment. Lots more videos are coming very soon. Thanks.

[@jorgemock]

Always like your posts, because I think its very good work

[@EugeneKhutoryansky]

Jorge Mockaitis Thanks for the compliment.

[@cidshroom]

Eugene Khutoryansky Fantastic! Another video from you is always welcome. Keep them coming, and great work so far!

[@EugeneKhutoryansky]

***** That's a wolf, not a dog. This is supposed to be a wolf, a fox, and a coyote. And thanks for the compliment on my videos. I am glad you like them.

[@EugeneKhutoryansky]

*****, I didn't write the equation relating torque to force, but I showed the relationship graphically. I try to use as few equations as possible when explaining these concepts, just as was the case in my videos on Quantum Mechanics and Relativity.

[@bryanseare2704]

This helps me prepare for my physics class. Learning the basic concepts makes it easier to digest the lectures that are more in depth, and helps me put the math i do in context.

[@EugeneKhutoryansky]

I am glad my video was helpful. Thanks.

[@mohitkwatra9587]

I really want to meet and thank the person behind these! It gives complete intutive feel of each concepts❤️❤️

[@EugeneKhutoryansky]

Thanks. I am glad that you like my videos that much.

[@tunneltrance]

imagine if these videos were in virtual reality? That's a million dollar idea. You could start a khan academy with virtual reality animated tutorials and put every university out of business

[@asterixgallier8102]

Do it then! XD

[@Zeegoku1007]

Damn right 😎

[@briandiscala]

Stormbreaker lol

[@CaptchaSamurai]

Some are already trying. Here is one I know of: kzbin.info/www/bejne/kHuuZZJ3nKepitE

[@纃]

What if the education system implement how the equation was derived and how it is physically or with a model and with vr you can do those stuff more realistically and it's more feasible. I think we need to be taught to experiment and come up with equations with experiments to really understand what the equation is with numbers and you can just use an algorithm to find the best number to fit the equation from other equations of the relevants to find unthinkable equations for more progress

[@johnnyvinje7597]

15:58 : In the absence of an external torque, the angular momentum of an object is always constant. Yes out in space, but here on mother earth we have something called gravity and there is some air resistance that will slow down the object that is rotating. The angular veloctity is time dependent, and will slow down due to the friction we have in the air. Nice videos, i have been struggling to understand the dynamics in class, but you have opened my eyes. Keep up the good work :-)

[@elia8544]

I know you have already received much praise for your work over the years but I think we should still tell you the amazing work you’ve done. Your videos are incredibly helpful and “simplify” it but still talk about the math so we truly understand it. Thank you.

[@EugeneKhutoryansky]

Thanks for the compliments. I appreciate it. I am glad my videos are helpful.

[@EugeneKhutoryansky]

You can help translate this video by adding subtitles in other languages. To add a translation, click on the following link: kzbin.info_video?ref=share&v=leZX0GpV5W0 You will then be able to add translations for all the subtitles. You will also be able to provide a translation for the title of the video. Please remember to hit the submit button for both the title and for the subtitles, as they are submitted separately. Details about adding translations is available at support.google.com/youtube/answer/6054623?hl=en Thanks.

[@EugeneKhutoryansky]

TheAdel, I am sorry about this. The way that KZbin subtitle editing works is that anyone can offer a submission, and then anyone can then offer modifications to that submission. The person who created the modifications did not know who the original submission was from, so he did not know how to contact you about this. I apologize that this happened to you.

[@sagidelsayed8399]

You are like a good model of a facilitator teacher who gives an easy-to-learn visualization of math and science . . thank you .. go ahead .. God bless you.

[@EugeneKhutoryansky]

Thanks for the compliments.

[@altuber99_athlete]

Honestly I love so much these animations and I feel lucky for finding this channel. This is one the best channels of animated physics; moreover its animations are _unique_ compared to other channels'!

[@EugeneKhutoryansky]

Thanks for the compliment about my videos.

[@bronson8x993]

These videos are awesome! I've been watching your physics videos for a couple of years now. And I'm always coming back for another round of knowledge :) Thank you very, very much.

[@EugeneKhutoryansky]

Thanks. I am glad you like my videos.

[@יאירליבנה-פ8ח]

Finally, a visual representation for all I had learned in physics class. And with forest animals, too! This video is a hidden gem in my algorithm ❤

[@EugeneKhutoryansky]

I am glad you enjoyed my video.

[@АлександрБабаев-п2й]

В этом видео прекрасно всё: и лес, и животные, и музыка. Ну и физика конечно же

[@billmaghan]

The illustrations are wonderful. Thank you for the subtitles.

[@EugeneKhutoryansky]

Thanks for the compliment about my animations.

[@yechielm613]

Your descriptions and animations are delightful. Thank you for helping me understand what torques are.

[@EugeneKhutoryansky]

Thanks for the compliments. I am glad you liked my video.

[@pbj4184]

11:43 That is a great geometric representation of mr^2. Loved it!

[@EugeneKhutoryansky]

Glad you liked it. Thanks.

[@deadbzeus]

Your videos are amazing tools at describing and visualizing complex processes. Thank you so much for all your hard work over the years.

[@EugeneKhutoryansky]

Thanks for the compliments.

[@BoZhaoengineering]

Absolutely awesome! I like all the definitions you offered, which are all clear and no confuse to me. Moreover, you define what a terminology refers very carefully and step by step.

[@EugeneKhutoryansky]

Thanks for the compliments. I am glad you liked my video.

[@sudiptoatutube]

I love your videos too much. In your videos not only a human learns Physics, but also every animal including frogs, tortoise, fox and even an intelligent owl also learn Physics. Hats off to you.

[@EugeneKhutoryansky]

Thanks for the compliments. I am glad you liked my videos.

[@newyorkguy158]

I love the videos and the soft classical music in the background. Funny and educational. Love the squirrel lifting the moose.

[@EugeneKhutoryansky]

I am glad you liked my video. Thanks for the compliments.

[@resquiciosdecielo4547]

I have to say that i like the way passion and Eugene's video style mix together to create these videos, that makes physics not only understandable but enjoyable. As a future engineer and most important, as student i really appreciate your work, and i have to say you are clever! Grasp an abstract idea, understand it AND explain it in a way others can understand is key in education. Keep it doing. Greetings from Colombia 🇨🇴 :)

[@EugeneKhutoryansky]

Thanks for the compliments. I am glad you like my videos.

[@tiagofranca2660]

Really great video, Eugene!! Perfect animations and explanations! PS: I loved the wolves (or, the wolf the fox and the coyote), haha. Keep these videos coming!

[@EugeneKhutoryansky]

Theenerd ジェームズ Thanks. I am glad you liked the video, and that you liked the animals.

[@theseeker7903]

Eugene you a brilliant person. Your way of explaining things is mind blowing.

[@EugeneKhutoryansky]

Thanks for the compliment.

[@zhouwu]

I like the dog and the fox and the wolf. :D

[@zhouwu]

+Zhou Wu The wolf is always so puzzled! I really like it!

[@EugeneKhutoryansky]

+Zhou Wu, that was supposed to be a coyote, a fox, and a wolf. But thanks.

[@zhouwu]

I'm from New Zealand and we don't have Coyotes here, which is probably why I thought I was a dog. I'm only read about Coyotes in books.

[@Virusnzz]

+Zhou Wu Ha! Me too on all three counts.

[@nargis7646]

Thank you for making these awesome videos which help us understand concepts so clearly. You are a saviour.

[@EugeneKhutoryansky]

Thanks for the compliment. I am glad my videos are helpful.

[@sheebapratap2555]

You have no idea how helpful your videos are for people in search of teachers to clear their concepts Thank you#respect😊

[@EugeneKhutoryansky]

Thanks. I am glad to hear that my videos are helpful.

[@mohamadmawed6078]

What a great video . Amazing illustration and a huge effort . I highly appreciate your work .

[@EugeneKhutoryansky]

Thanks. I am glad you liked my video.

[@TheyCallMeNewb]

Turn your avuncular talents to the pauli exclusion. ! Your uploads are a gift to those fortunate enough to stumble upon them. Collectively, we salute you. !!

[@EugeneKhutoryansky]

TheyCallMeNewb, I'll add the Pauli exclusion principle to the list of topics for future videos. Thanks for the suggestion, and thanks for the compliment.

[@gnuPirate]

Really awesomely great, per usual ! Thanks for the brilliant work.

[@EugeneKhutoryansky]

Thanks. I am glad you liked it.

[@mannouriscy]

I've been searching for such a video about torque for a very long time. Thanks a lot!

[@EugeneKhutoryansky]

mannouriscy Glad I was able to help. Thanks.

[@saminkalhor4281]

best youtube channel ever...u changed my POV soooooo dramatically..Thanks

[@EugeneKhutoryansky]

+Samin Kalhor, thanks for that really great compliment. I am glad that you like my channel that much. Thanks.

[@saminkalhor4281]

Eugene, the Fourier Transform.... U nailed it... Awesome....

[@torwalk6978]

A new level of perfection is set :)

[@EugeneKhutoryansky]

Torwalk Thanks for that really great compliment.

[@emillytabara9410]

Your videos are amazing! I appreciate all of them! it is sometimes difficult to see the behavior of the system only with pencil and paper. When I'm studying, I come to watch your videos for better understanding. Thank you for that!

[@EugeneKhutoryansky]

Thanks for the compliment. I am glad my videos are helpful.

[@poochiebar]

Excellent video, mate! Really enjoy you videos and you deserve an enormous amount of recognition Subbed and liked 😄

[@EugeneKhutoryansky]

benneth white Thanks for the compliment, and I am glad that enjoy my videos.

[@elmarjahangirov543]

You give a great gift to humanity. It must worth!

[@prakashpaudel2708]

Excellent video again.. Can't wait for your upcoming videos.

[@EugeneKhutoryansky]

Prakash Paudel Thanks. Glad you liked it. Lots more are on their way.

[@alandouglas2789]

Fantastic video Eugene, Well done!!

[@EugeneKhutoryansky]

Alan Douglas Thanks. Glad you liked it.

[@veezee9256]

Loved it with the four legged helpers...!!!

[@EugeneKhutoryansky]

Vee Zee Thanks. I am glad you liked it.

[@inlovewithtruthtruth8387]

it's really really amazing... Yors all videos are outstanding...there are no words to describe their magnficance.. Yor are amazing.... keep it up ...waiting for for new ideas and videos...

[@EugeneKhutoryansky]

Thanks for the compliments. I am glad you like my videos.

[@abhinitsccc]

Sir u are a brilliant Man...Lotz of Respect from INDIA!!

[@EugeneKhutoryansky]

Thanks for the compliment.

[@victorsanchez5939]

Apartir de que empecé a ver estos vídeos entendí mucho mejor la física. Están fabulosos.

[@jefwowes1607]

This is perfect! The begining with the animals is awesome. I think childrem must love it. Greeting from Czech. :)

[@EugeneKhutoryansky]

Thanks for the compliment.

[@CamNoble]

Hey Eugene. I really enjoyed this explained in simple terms. Great Video!

[@EugeneKhutoryansky]

+CamNoble, thanks. Glad you liked it.

[@CamNoble]

+Eugene Khutoryansky An interesting application combining the Universal Law of Rotation and Gravity was done by James Watt (1788) in his centrifugal governor. This device is also known as the "Fly Ball Governor" for steam engines. Personally, I found it to be an elegant method of early systems control. Although its original use is considered archaic, the principal is in modern day machines like CVT transmissions.

[@Polarcupcheck]

These videos are very good.

[@EugeneKhutoryansky]

I am glad you like my videos.

[@Kasey-ww3oy]

Your videos are the best, thanks to u i got a feel for mechanics. Subscribed!!

[@EugeneKhutoryansky]

Thanks for the compliment. Glad to have you as a subscriber.

[@lokmaniupadhyay7235]

its not about knowledge but revelation, keep it up ! i hope someday normal classes would be this interesting

[@EugeneKhutoryansky]

Thanks.

[@suta1150]

your videos give me new lights to physics thank you besides i love this opening sequence with classic music and animals... wow...educational

[@EugeneKhutoryansky]

Thanks!!!

[@atakany.264]

Thank you very much, this is absolutely amazing for me. I love see physics like this images,videos..

[@EugeneKhutoryansky]

Thanks. I am glad you like my videos.

[@kvsalahuddin5]

This is pure gold 👌..great work

[@EugeneKhutoryansky]

Thanks. I am glad you liked my video.

[@iammichaelcarr]

Eugene thank you so much, these videos are incredible and I love watching them. Learning so much.

[@EugeneKhutoryansky]

Glad you like my videos. Thanks.

[@Music-tt1wl]

Amazing 10 minute animation just perfectly summarized 5 hours lessons of school

[@EugeneKhutoryansky]

Thanks for the compliment about my video.

[@josephbigler]

I have watched many of your videos and find them fascinating. I find the combination of Kira's voice and the background music helps me to follow along and avoid distractions. I would like to try a set of problems to test my understanding. Can you recommend anything? Thanks to both of you for the enormous amount of effort it must take to make these videos.

[@EugeneKhutoryansky]

Thanks for the compliments. I am sorry, but I don't have a recommendation for a set of problems.

[@sheester21]

Thank you for your videos Mr. Eugene.

[@EugeneKhutoryansky]

Thanks. I am glad you like my videos.

[@MainulHasan1995]

great channel in youtube.. thank You Lot

[@EugeneKhutoryansky]

In am glad you like my videos. Thanks.

[@malm7arb]

I remember when i took this lesson in physics class in 11th grade, I Graduated few months ago and this video brings a lot of good memories about physics class :)

[@EugeneKhutoryansky]

AL_ muharb Glad to bring back good memories.

[@utpalghosh9633]

sir, salute to you. you are genius. this video enriched my knowledge and clear concept regarding rotational motion. we expect such more videos from you. thanks.

[@EugeneKhutoryansky]

Thanks for the compliment about my videos. More videos are on their way.

[@vedgumaste2664]

Really awesome video! Understood the concept of Moment of Inertia which I mugged up for exams! I really thank you for such great and informative videos which are helping lots of people for understanding concepts easily!😊

[@EugeneKhutoryansky]

+Ved Gumaste, thanks. I am glad you liked my video.

[@sanafiyaa]

This is really amazing! Well defined, easier to grasp... Really enjoyed it...❤️

[@EugeneKhutoryansky]

Thanks. I am glad you like my videos.

[@modimaruti5874]

Great informative video sir 👍 👍 👍 great work sir

[@EugeneKhutoryansky]

Thanks for the compliment about my video. Glad you liked it.

[@XboxSkateVids]

Still killing it with the videos! I would like to see a video about entropy. I kind of half understand it, and id love to see how you teach it!

[@EugeneKhutoryansky]

XboxSkateVids, I already have a video on entropy. It is titled, "Thermodynamics and the End of the Universe." Though, I will soon also be coming out with a second video on entropy. And thanks for the compliment about my videos.

[@ooraculo223]

I like the animals in the videos. They make them much more interesting. Very good ideia.😺

[@EugeneKhutoryansky]

Thanks.

Great videos! Source for knowledgment. Congratulations, go ahead.

[@EugeneKhutoryansky]

Thanks for the compliment about my videos.

[@sajumonthomas5086]

Very good video. Nice work

[@EugeneKhutoryansky]

Thanks. Glad you liked my video.

[@TURNON111]

I don't understand always torque and levers e.t.c but after seening your video I understand now I can solve this .

[@EugeneKhutoryansky]

Glad my video was helpful.

[@TURNON111]

@@EugeneKhutoryansky my dream 😟😟 is to be scientist but no one will help me now I am 18 years old I thing I have to relate with these videos I have some my theories

[@humbertobustosguzman3259]

Clever and clear topics.

[@EugeneKhutoryansky]

+Humberto Bustos Guzmán, thanks. I am glad you like my videos.

[@alexs6284]

hey eugene im a big fan of your vedios from india .....these r superbbbbbbb brilliant they r just incomparable plzzz make more n more vedios

[@EugeneKhutoryansky]

Thanks. I am glad that you like my videos. More videos are on their way.

[@Boooommerang]

Thanks! Always a perfect job!

[@EugeneKhutoryansky]

Thanks for the compliment.

[@zahraarain7635]

Your animations are superb!!

[@EugeneKhutoryansky]

Thanks for the compliment. I am glad you like my animations.

[@tejaswini9368]

I really love your videos....they are more than amazing.this makes physics really easy.😊:):D

[@EugeneKhutoryansky]

Thanks for the compliment about my videos. I am glad you like them.

[@kmalnasef1512]

you are a genius I like all your videos

[@EugeneKhutoryansky]

Thanks for that really great compliment and I am glad that you like my videos.

[@kmanojsuresh]

Thank you. Great work!

[@EugeneKhutoryansky]

Manoj Suresh Thanks for the compliment. Glad you liked the video.

[@cascaderivulet9254]

From Bangladesh, your video is amazing.... love the slowness especially!! But I think I have a bit more confusion about torque and Moment of Inertia. Do you have videos on these with the maths and interpretation of intution of the formulas?

[@tejusramakrishna2965]

these videos are very helpful thank you.

[@EugeneKhutoryansky]

Glad to hear that my videos are helpful. Thanks.

[@johnsells6023]

Such great explanations

[@EugeneKhutoryansky]

Thanks. I am glad you liked my explanations.

[@joseville]

This video is not only educational, but also somehow relaxing?

[@EugeneKhutoryansky]

I am glad you enjoyed my video.

[@triptizzz6411]

thank you , your content is very helpful.

[@EugeneKhutoryansky]

I am glad my videos are helpful. Thanks.

[@wiraperdanasilitonga1140]

very very very good explanation

[@mohammedadil6181]

Awesome video as always, you work with other science youtubers! Also could you please make a video explaining inertia? And the transmission among the slides of the video are kinda slow Keep it up I really enjoy your videos

[@mohammedadil6181]

You *should work with other science youtubers

[@HrishitaSurve-zb6dq]

what a beauiful explanation 😃

[@EugeneKhutoryansky]

Thanks. I am glad you like my explanation.

[@kevinbaugh4147]

These videos are amazing!

[@EugeneKhutoryansky]

Thanks for the compliment about my videos.

[@subramaniamg8004]

Good explanation Eugene sir

[@EugeneKhutoryansky]

Thanks. I am glad you liked my explanation.

[@ramalingamsaravanan3898]

Excellent You are rocking

[@EugeneKhutoryansky]

+RAMA LINGAM SARAVANAN, thanks.

[@mdjawaideqbal2941]

Wish these videos were available when I was in college

[@EugeneKhutoryansky]

I am glad you like my videos.

[@prasukjain8286]

these videos help me to visualize and not mug up formulas , thanks

[@EugeneKhutoryansky]

I am glad that my videos are helpful. Thanks.

[@jamescarmody4713]

10:00 I stood up and spun with the torques. My bro comes in and asks what I’m doing. I say “I’m applying an upward torque.” Now I get the right hand rule!

[@joeg3536]

Said, Total motion= motion of CG + Rotational motion. Is it linear displacement+Rotational displacement ?

[@MoeSaad194]

Great video . Anyone knows the background music please ?

[@EugeneKhutoryansky]

All the music in this video is from the free KZbin audio library, and the names of the songs are the following. Morning_Mood_by_Grieg Waltz_of_the_Flowers_by_Tchaikovsky Mast

[@BartdeBoisblanc]

Hey Eugene do you have a video tutorial on Lagrange points between planets and the stars they orbit? The spinning balls on a stick rotating made me think about the James Web Telescope out at L2, Thanks

[@EugeneKhutoryansky]

No, I don't have a video on that. But, I have a video on Lagrangian Mechanics at kzbin.info/www/bejne/e5TIh32AfKZ5fKs

[@Felipx2812]

thank you !! thank you !! thank you !!

[@EugeneKhutoryansky]

You are welcome and thanks.

[@ananyasingh5409]

Can you explain? Why an object tends to rotate about it's center of mass when no external force acts on it?

[@productioncurrent2480]

brilliant teaching

[@EugeneKhutoryansky]

Thanks. I am glad you like my videos.

[@bloggervista]

nice :) Great animation . Now which videos are you going to make?

[@EugeneKhutoryansky]

Shirshak Bajgain Thanks for the compliment. I am glad that you liked the animations. As for the topic for my next several videos, I would like to leave this as a surprise. :)

[@simonriley849]

Eugene, is the voice a robot or your actual voice? That voice just fits in very well with the video

[@EugeneKhutoryansky]

Simon Riley The narration for all my videos is done by Kira Vincent.

[@Д.Түвшинбаяр]

When force applied is constant. Why lenght of lever arm increases torque? Why intermolecular forces causes increased torque?

[@pranhav]

Hey eugene, can you make videos on, perpendicular axis theorem, parallel axis theorem, rotational motion, centre of mass and can you help us tackle problems like the 2016 jee advanced exam rotational motion question using intuition

[@EugeneKhutoryansky]

I will add the perpendicular axis theorem and the parallel axis theorem to my list of topics for future videos. I believe I already covered rotational motion and center of mass in this video. I also have some other videos on these topics in my playlist "Mechanics videos in order" at kzbin.info/aero/PLkyBCj4JhHt-EKlWZmoaw9V9-qIDdngm6. Thanks.

[@pranhav]

@@EugeneKhutoryansky thank you so much.

[@JamesSmith-ek1or]

You should do some more videos regarding mathematics, particularly more concepts of calculus

[@buthokhan5701]

Does analysis of bending moment in concrete beams use the same concept that you showed here. I see similar concpets.

[@physicskipaathshala9708]

excellent video

[@EugeneKhutoryansky]

Thanks. Glad you liked it.