Rotational Motion

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053 - Rotational Motion
In this video Paul Andersen explains how a net torque acting on an object will create rotational motion. This motion can be described by the angular displacement, angular velocity, and angular acceleration. The linear velocity can be calculated by determining the distance from the axis of rotation. The net torque is equal to the product of the rotational inertia and the angular acceleration.
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Music Attribution
Title: String Theory
Artist: Herman Jolly
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All of the images are licensed under creative commons and public domain licensing:
“Moment of Inertia.” Wikipedia, the Free Encyclopedia, September 7, 2014. en.wikipedia.org/w/index.php?t....
“Radian.” Wikipedia, the Free Encyclopedia, September 6, 2014. en.wikipedia.org/w/index.php?t....

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2 авг 2024

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Комментарии : 148

@HobosoftheWorld 8 лет назад

I think I learned more in this one video than in the ~20 hours we spent on this in class.

@HM-rc7nn 9 лет назад

WHAT A GREAT TEACHER HE IS !!!!!!!!!

@ShamsThoughts 8 лет назад

You are a life saver. i have my final exam tomorrow and never thought that one day i would understand physics ;) THANK YOU SO MUCH!!!!

@simrankulkarni7895 8 лет назад

wow! he's a really good teacher. This video was very helpful.

@davidbuderim2395 9 лет назад

Enjoying this series very much. Dark Side of the Moon is my favourite album of all time - shocked and delighted to see it.

@edmundshumway3869 6 лет назад

The animation about radians was easy to understand and was a great tool.

@ethanperez9474 7 лет назад

this dude taught me more in 10 minutes than my physics teacher has taught me all year

@mrzues7260 7 лет назад

Great video. Thanks a bunch and keep making videos! You are helping a lot of people whether they say it in the comments or not.

@jameserayburn 6 лет назад

This is the best video on angular velocity I've seen. Two big thumbs up to you sir.

@BangMaster96 7 лет назад

I wish colleges would test teachers based on how well they can teach not based on how much they know about a certain subject because my physics professor is very knowledgable about Physics but is complete garbage when it comes to teaching it So Universities, start hiring teachers who can f**king teach

@lingkejiang9244 7 лет назад

They wouldn't do that because if they hire professors that could teach (who are always less likely to be capable in research) they wouldn't earn so much money and reputation

@joshuapfingerle4704 3 года назад

@@lingkejiang9244 Ding ding ding! We have a winner! Most of the time, universities are for the money/prestige aspect, and the actual education aspect comes in a very distant second. I don't normally swear, but I feel strongly that it's complete bullshit if you ask me, especially, and I mean ESPECIALLY because they charge you money for your so-called "education" which could be done much better at your local library, and it's not a light amount either.

@srirampatnaik9164 3 года назад

Wait? This is a college-level course? I thought AP was high school stuff.

@joshuapfingerle4704 3 года назад

@@srirampatnaik9164 I believe that he is not referencing the video, but rather his general experience/knowledge.

@nilphilodox5759 2 года назад

@@srirampatnaik9164 You learn the same material in physics 1 in college which is equivalent to Ap Physics 1. The only thing that is different about college is that the professor can't teach shit but you are still expected to do good.

@ploypins 7 лет назад

This is what i was looking for. You have answered every questions i got. thank you so much.

@streetrypper9961 7 лет назад

I am a senior in high school (Neville) and I found this video to be extremely helpful

@heathersong104 7 лет назад

I normally watch your lessons for chem and bio. It's amazing that you can even do physics !!!!

@phuzo3320 5 лет назад

No one can explain this topic better than u....... Superb

@LinkLegend0 6 лет назад

You are an excellent teacher sir. Thank you for your effort, you help me alot.

@kirillkondrachov4864 8 лет назад

Can I have you instead of my current physics prof?

@lingkejiang9244 7 лет назад

No, not even a chance

@jeenas1567 5 лет назад

Same here

@hamzabahi6720 5 лет назад

﷽ ﷺ ﷺ

@aleksakaric1450 4 года назад

Same here. I sometimes wonder what’s up with most physics professors.

@hebaahmed4279 9 лет назад

Thank you very much for the concise and clear explanation.

@evanryan4137 8 лет назад

Why do i even go to college when i learn everything from youtube

@koda1082 8 лет назад

Colleges give you the connections to internships, research opportunities, fellowships, and jobs, but college makes you learn independently.

@lingkejiang9244 7 лет назад

College sucks

@JimmyCrust 7 лет назад

well most of the jobs people apply for regardless of diploma don't actually need one

@joshuapfingerle4704 3 года назад

@@JimmyCrust THIS. They even told me while I was at a well known college (New England Tech) that most employers don't care about your college - it's more about who you know or your experience.

@MrMarkgyuro 4 года назад

i just study physics as a hobby. Your animations really makes easier the understanding of the theories.

@HeadwatersAcademy1 9 лет назад

Great explanation, thanks for posting the videos.

@zboy303 9 лет назад

Love your videos, although I'm a bit thick, so I have to keep pausing and rewinding to get it :)

@PaKiKiNg908 7 лет назад

You are Awesome Mr. Anderson!

@lucywang2716 8 лет назад

love the examples

@cheetah1347 7 лет назад

Best chanel for physics lectrues.

@danieljoseph6404 7 лет назад

thanks a lot for this video sir it made me understand the concept pretty well :)

@nadezhdadimitrova4042 8 лет назад

Very nice, thanks!. Wonderful simulations and explanations.

@imo0ods7 9 лет назад

you are the best!

@lizzyberg1082 7 лет назад

thankyou soo much!!!Amazing video and superb animation!!

@jimbocontaoiraguro9057 9 лет назад

Thank you for this kind of tutorial, it would help on my reporting :D

@starwarfan8342 5 лет назад

Saved my ass in AP Bio, and you're still saving it now...

@lucferahikari450 7 лет назад

I respect you. you are doing a very good job keep it up....

@user-uw7nh2sz4t Год назад

it was really helpful , would love to watch more to burn the desire of curiosity .

@searleashlee 6 лет назад

Good work Paul

@BRUZBARILARO 7 лет назад

this will help me in my final exam thank you so much

@hennree 9 лет назад

Thanks.Explained very well and in detail

@nauteeq 9 лет назад

Guy, you gats obtain PHD for this physics something, o. Any chance I receive lecture from you?

@reginaong05 2 года назад

You teach a lot better than my current science teacher THANK YOUUUU

@Kyrowebb 7 лет назад

Very very helpful thank you so much

@daniloorbolato 7 лет назад

amazing video. thank you!!

@flowerchild7471 8 лет назад

Thankyou so much for your videos your amazing

@ItsGordo2 7 лет назад

Very helpful thank you!!!

@prime3333 4 года назад

great video!

@mujahid4764 3 года назад

Always the best

@k.chriscaldwell4141 3 года назад

Excellent. Thanks.

@richbeyer1269 4 года назад

Thank you so much you're a lifesaver

@thecerebrum. Год назад

Helpful. Thank you

@hussamalshammari4705 8 лет назад

very good explanation

@priyadarshanishendage698 6 лет назад

U r doing grt job

@chetanbavaskar4364 8 лет назад

best one i have ever seen ..:)

@globalteacher_amai Год назад

You’re so awesome!

@alexdyck9355 7 лет назад

Thanks it helped. Also, thanks for adding subtitles

@alexdyck9355 7 лет назад

I also like that you explained it very quickly, it makes it much easier to cram lol

@sheikmuhammadali2717 6 лет назад

Great video...thank u so much....

@apoorvagopal5023 7 лет назад

thx a lot..that was helpful for sure

@2ksy462 7 лет назад

gr8 explanation!!

@countryside6550 3 месяца назад

great video

@girirajkashyap2912 3 года назад

Excellent 🙏

@76354542q Год назад

My class liked this.... Thank You :)

@mooly15 9 лет назад

THANK YOU !!!!!!!!!

@ahmedqaysib 8 лет назад

this's very good

@zerui8437 8 лет назад

Thankyou very much, I am still working on this.

@jeffpirog9939 2 года назад

Super helpful

@abhishekchatterjee7184 3 года назад

Very nice.

@littlerabbit7857 Год назад

It helps me understand.

@sumitshah8071 9 лет назад

It is amazing

@diribagonfa4884 7 лет назад

good explanation

@akhtarhussain3263 8 лет назад

Thanks for explanation

@dommarajubhaskar3526 4 года назад

Thank you sir

@technotux7835 2 года назад

2 masses on a spinning table one is heavier than the other, which mass will move farther from the centre?

@amrutvani2 9 лет назад

Mr Anderson u r great.Very nice clip. One question ? Why the direction of angular velocity is perpendicular to the plane of ur vinyl record ?

@lizzyberg1082 7 лет назад

amazing!

@serinatsuki9511 9 лет назад

Cool thanks but does the rotational speed of an object on a turntable increase or stay the same as the object moves further away from the center of the turntable?

@Marwan4EM 7 лет назад

Subscribed.

@mathalgebraicalculus6325 2 года назад

Thanks man

@user-um9sl1kj6u 11 месяцев назад

This kind of reminds me of so I can take fly wheels, and also giant rotating magnets, which essentially are at the center of planets and stars. They have the size and torque necessary in order to generate those huge magnetic fields that extend outward

@suzy6499 6 лет назад

wow he is a good teacher

@wishdoom 8 месяцев назад

good point

@amoreno830 9 лет назад

Thank you!!!!!!!!!!!!!!!!!!!!

@cpratham3 8 лет назад

thanx sir!

@sidhart6744 6 лет назад

You da real mvp

@Alia-rw9ti 8 лет назад

Thanks much!

@diagotorres4094 8 лет назад

damn good explanation

@YawnGod 9 лет назад

Cool.

@ericsung14 7 лет назад

Thank you

@mvfazio 9 лет назад

Question: For the demo with the mass tied onto the PVC pipe--I understand that the one with the mass on the end has a greater rotational inertia, but at the same time isn't there more torque applied by gravitational force when one has more mass concentrated farther from the axis of rotation? I'm having trouble justifying these results, but I repeated the experiment and got the same thing as you.

@joshuapfingerle4704 3 года назад

I believe how it works is that the gravitational force works equally downward on all points in the object/system of particles, so the torque doesn't really matter because the fact it is equal all over cancels it out - usually torque only causes a rotation if one spot has extra force compared to the others, for example by pushing hard on the edge of a door opposite to the hinges, but all the rest of it has no force applied.

@adosar5414 6 лет назад

what is the centripetal force in a rolling disk? the net intermolecolar forces for every "molecule" of disk? thx in advandance

@joshuapfingerle4704 3 года назад

Centripetal force = mass * centripetal acceleration (Newton's Second Law formula), where centripetal acceleration = linear/tangential velocity times itself (squared) divided by the radius of the circular path you are following.

@Mech.Masters 8 лет назад

Let us consider a round plate mounted on a bearing. If the mass of the plate is m kg and it has a diameter of d mm. How do I calculate the torque required to bring it in motion?

@joshuapfingerle4704 3 года назад

The formula you would use is torque = linear force * distance (radius) of linear force from center * sin(angle between these two variables), so you would have to figure out the acceleration first as you don't have enough info as is, then use the formula F = ma to get the force applied on the object, then divide d by 2 to get the radius, and then finally use the torque formula described above

@wingsorflys 7 лет назад

In rotational motion what is lamina

@glitch2.087 5 лет назад

Omg ....ur great 😚😚

@ahmadsasi4737 6 лет назад

Thanx

@khadijah.b5326 5 лет назад

Please how did you get the 3.49 rad for the velocity?

@ameerhamza4816 5 лет назад

He converted revolution to radian

@khadijah.b5326 5 лет назад

Thank you

@prasannafernando704 7 лет назад

thanks

@peterstewart1491 4 года назад

At 6:51 how'd you go from rad/s * m = m/s, seems it should read = rad*m/s

@HM-rc7nn 9 лет назад

plz give me some tips how can I manage my Science ? I am weak in physics. You are a GREAT TEACHER.

@vish4544 7 лет назад

Haha pink floyd, what can stop me from subscribing to you now? 😸

@ganeshbhanare1087 6 лет назад

I am the unserstand the Chapter ROTATIONAL MOTION Thanks sir you are very gorgoius sir

@naeemghafori5046 8 лет назад

isnt hollow object have the greater inertia i was waiting for the green one to go down fırst

@gingerninja117JD 7 лет назад

at 8:55 you say the lighter object has less rotational inertia and thus has a lower acceleration than the more heavy object, surely it would have a greater acceleration because it hits the ground first???????

@appleseed3456 3 года назад

I had the same question. Wouldn't the lighter pole have a greater acceleration since the force (gravity) is the same for both poles, but the lighter pole has less inertia?