A man, holding a weight in each hand, stands at the center of a horizontal frictionless rotating turntable.The effect of the weights is to double the rotational inertia of the system.As he is rotating, the man opens his hands and drops the two weights.They fall outside the turntable.Then:
A)his angular velocity doubles
B)his angular velocity remains about the same
C)his angular velocity is halved
D)the direction of his angular momentum vector changes
E)his rotational kinetic energy increases

Question

Quizplus · Accepted Answer

The rotational inertia of the system is doubled when the man holds the weights. When he drops the weights, the rotational inertia is halved, so his angular velocity remains about the same.

A Man, Holding a Weight in Each Hand, Stands at the Center