Rotational Motion
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- เผยแพร่เมื่อ 2 มิ.ย. 2024
- 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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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....
I think I learned more in this one video than in the ~20 hours we spent on this in class.
WHAT A GREAT TEACHER HE IS !!!!!!!!!
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!!!!
wow! he's a really good teacher. This video was very helpful.
The animation about radians was easy to understand and was a great tool.
Enjoying this series very much. Dark Side of the Moon is my favourite album of all time - shocked and delighted to see it.
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.
No one can explain this topic better than u....... Superb
Can I have you instead of my current physics prof?
No, not even a chance
Same here
﷽ ﷺ ﷺ
Same here. I sometimes wonder what’s up with most physics professors.
This is the best video on angular velocity I've seen. Two big thumbs up to you sir.
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
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
@@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.
Wait? This is a college-level course? I thought AP was high school stuff.
@@srirampatnaik9164 I believe that he is not referencing the video, but rather his general experience/knowledge.
@@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.
Why do i even go to college when i learn everything from youtube
Colleges give you the connections to internships, research opportunities, fellowships, and jobs, but college makes you learn independently.
College sucks
well most of the jobs people apply for regardless of diploma don't
actually need one
@@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.
This is what i was looking for. You have answered every questions i got. thank you so much.
Thank you very much for the concise and clear explanation.
I normally watch your lessons for chem and bio. It's amazing that you can even do physics !!!!
You are an excellent teacher sir. Thank you for your effort, you help me alot.
Great explanation, thanks for posting the videos.
this dude taught me more in 10 minutes than my physics teacher has taught me all year
i just study physics as a hobby. Your animations really makes easier the understanding of the theories.
Very nice, thanks!. Wonderful simulations and explanations.
You are Awesome Mr. Anderson!
Love your videos, although I'm a bit thick, so I have to keep pausing and rewinding to get it :)
love the examples
thankyou soo much!!!Amazing video and superb animation!!
Good work Paul
thanks a lot for this video sir it made me understand the concept pretty well :)
it was really helpful , would love to watch more to burn the desire of curiosity .
Best chanel for physics lectrues.
I respect you. you are doing a very good job keep it up....
I am a senior in high school (Neville) and I found this video to be extremely helpful
Thank you for this kind of tutorial, it would help on my reporting :D
you are the best!
Saved my ass in AP Bio, and you're still saving it now...
Thanks.Explained very well and in detail
Guy, you gats obtain PHD for this physics something, o. Any chance I receive lecture from you?
very good explanation
this will help me in my final exam thank you so much
Very very helpful thank you so much
great video!
amazing video. thank you!!
Very helpful thank you!!!
You teach a lot better than my current science teacher THANK YOUUUU
Thank you so much you're a lifesaver
My class liked this.... Thank You :)
Thankyou so much for your videos your amazing
best one i have ever seen ..:)
U r doing grt job
Excellent. Thanks.
Helpful. Thank you
You’re so awesome!
Always the best
great video
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 ?
Thanks it helped. Also, thanks for adding subtitles
I also like that you explained it very quickly, it makes it much easier to cram lol
Great video...thank u so much....
gr8 explanation!!
this's very good
thx a lot..that was helpful for sure
good explanation
Thanks for explanation
Excellent 🙏
Thankyou very much, I am still working on this.
Very nice.
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?
It helps me understand.
Super helpful
It is amazing
Thank you sir
THANK YOU !!!!!!!!!
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.
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.
amazing!
2 masses on a spinning table one is heavier than the other, which mass will move farther from the centre?
damn good explanation
Subscribed.
wow he is a good teacher
Thanks man
Thanks much!
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
thanx sir!
You da real mvp
Thank you
good point
Cool.
Thank you!!!!!!!!!!!!!!!!!!!!
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?
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
what is the centripetal force in a rolling disk? the net intermolecolar forces for every "molecule" of disk? thx in advandance
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.
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???????
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?
plz give me some tips how can I manage my Science ? I am weak in physics. You are a GREAT TEACHER.
Please how did you get the 3.49 rad for the velocity?
He converted revolution to radian
Thank you
At 6:51 how'd you go from rad/s * m = m/s, seems it should read = rad*m/s
At calculating linear velocity, the unit of angular velocity is rad/s and distance is in m. Multiplying both becomes m/s. where is rad?
radians and degrees are considered "dimensionless" An angle is the same whether you are close or far from the center so there is no dimension to it. Therefore you can also just ignore it in the dimensional analysis of your unit calculations.
OK so I'm trying to figure out how an object can move at the same speed and yet be able to cover bigger distances in the same time, such as what he demonstrated in this video
I am the unserstand the Chapter ROTATIONAL MOTION Thanks sir
you are very gorgoius sir
Thanx
1:22 If we apply a force *TO* a mass, we get acceleration. I believe you said "Force * mass = acceleration"
thanks
In rotational motion what is lamina
isnt hollow object have the greater inertia i was waiting for the green one to go down fırst
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it's better when compared to all,up to now