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College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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![A child of mass m = 40 kg is initially placed on the
edge of a uniform disk, of mass M = 100 kg and
radius R = 2.0 m, which is rotating with an angular
speed w_i about a vertical axis passing through its
center. The child moves on a radius and stops at
the distance a = 1.5 m from the edge of the disk as
indicated. If the final angular speed of the disk-child
system is w_f= 4.5 rad/s, determine the initial
angular speed w_i.
@f
m
a](https://content.bartleby.com/qna-images/question/03a1fbf9-ee9a-42cf-a2ec-d56e835afc7d/66f8e7a5-8917-4daf-924b-a9d5792ed2ac/jxj4h4s_thumbnail.jpeg)
Transcribed Image Text:A child of mass m = 40 kg is initially placed on the
edge of a uniform disk, of mass M = 100 kg and
radius R = 2.0 m, which is rotating with an angular
speed w_i about a vertical axis passing through its
center. The child moves on a radius and stops at
the distance a = 1.5 m from the edge of the disk as
indicated. If the final angular speed of the disk-child
system is w_f= 4.5 rad/s, determine the initial
angular speed w_i.
@f
m
a
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