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I am stuck on this problem and would be really greatful with any help on it. Thanks a bunch!

A carousel rotates at the rate of 0.15 rev/s with an 80-kg man standing at a point 2.0 m from the axis of rotation.

(a) What is the new angular speed when the man walks to a point 0.7 m from the center? Assume that the carousel is a solid 25-kg cylinder of radius 2.0 m. Answer is in rad/s

(b) Calculate the change in kinetic energy due to this movement. Answer is in Joules

2006-11-15 10:44:31 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics

2 answers

sorry. not that far in physics yet

2006-11-15 11:13:22 · answer #1 · answered by Mike P 3 · 0⤊ 3⤋

moment of inertia changes by 80(2^2-.7^2) so to conserve angular moment the angular velocity must change.

2006-11-15 11:44:46 · answer #2 · answered by meg 7 · 0⤊ 1⤋