(a) How much work has the force done at the instant the disk has completed two revolutions, starting from rest?

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Problem 3. A uniform disk (I = MR²/2) of mass 500 kg and radius 0.25 m is mounted on frictionless
bearings so it can rotate freely around a vertical axis through its center (see the following figure). A
massless cord is wrapped around the rim of the disk and pulled with a force of 10 N.
(a) How much work has the force done at the instant the disk has completed two revolutions, starting
from rest?
(b) What is the angular momentum of the disk at this time?
J
10 N
Transcribed Image Text:Problem 3. A uniform disk (I = MR²/2) of mass 500 kg and radius 0.25 m is mounted on frictionless bearings so it can rotate freely around a vertical axis through its center (see the following figure). A massless cord is wrapped around the rim of the disk and pulled with a force of 10 N. (a) How much work has the force done at the instant the disk has completed two revolutions, starting from rest? (b) What is the angular momentum of the disk at this time? J 10 N
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