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A Playground Merry-Go-Round with a Radius of 2

Question 7

Multiple Choice

A playground merry-go-round with a radius of 2.0 m and a rotational inertia of 100 kg m2 is rotating at 3.0 rad/s. A child with a mass of 22 kg jumps onto the edge of the merry-go-round, traveling radially inward. What is the new angular speed of the merry-go-round?


A) 1.6 rad/s
B) 1.2 rad/s
C) 2.4 rad/s
D) 2.0 rad/s
E) 3.4 rad/s

Correct Answer:

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