Merry-Go-Round - Conservation of Angular Momentum Problem
26.4 هزار بار بازدید -
5 سال پیش
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A 25 kg child is
A 25 kg child is sitting on the edge of a #MerryGoRound. The merry-go-round has a mass of 255 kg and is rotating at 2.0 radians per second. The child crawls to the middle of the merry-go-round. What is the final angular speed of the merry-go-round? You may make the following estimations: The child is a point particle; the merry-go-round is a solid disk and has an axle with negligible friction. #AngularMomentumConservation Want Lecture Notes? https://www.flippingphysics.com/merry... This is an AP Physics 1 Topic.
0:00 Intro
0:07 Translating the problem from words to physics.
1:32 Why the angular momentum of the system is conserved.
3:21 Using the equations for angular momentum and rotational inertia.
4:22 Substituting in equations and variables to solve the problem.
6:06 Understanding why the angular velocity of the system increased.
7:44 Finding the change in kinetic energy of the system.
8:55 Understanding why the change in kinetic energy of the system is positive.
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Thank you to Scott Carter, Cameron Vongsawan, and Christopher Becke for being my Quality Control Team for this video. http://flippingphysics.com/quality-co...
Thank you to Jonathan Sullivan-Wood for transcribing the English subtitles of this video.
0:00 Intro
0:07 Translating the problem from words to physics.
1:32 Why the angular momentum of the system is conserved.
3:21 Using the equations for angular momentum and rotational inertia.
4:22 Substituting in equations and variables to solve the problem.
6:06 Understanding why the angular velocity of the system increased.
7:44 Finding the change in kinetic energy of the system.
8:55 Understanding why the change in kinetic energy of the system is positive.
Next Video: Which Direction will the Wheel Accelerate?
https://www.flippingphysics.com/wheel...
Multilingual? Please help translate Flipping Physics videos!
http://www.flippingphysics.com/transl...
Previous Video: Wheel Conservation of Angular Momentum Demonstration and Solution
https://www.flippingphysics.com/wheel...
Please support me on Patreon!
Patreon: FlippingPhysics
Thank you to Scott Carter, Cameron Vongsawan, and Christopher Becke for being my Quality Control Team for this video. http://flippingphysics.com/quality-co...
Thank you to Jonathan Sullivan-Wood for transcribing the English subtitles of this video.
5 سال پیش
در تاریخ 1398/01/25 منتشر شده
است.
26,482
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