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If a gymnast sitting on a rotating stool...

If a gymnast sitting on a rotating stool, with his arms out stretched, suddenly lowers his hands, what will happen?

A

the angular velocity decreases

B

his moment of inertia decreases

C

the angular velocity stays constant

D

the angular momentum increases

Text Solution

Verified by Experts

The correct Answer is:
B
When hands are lowered R decrease. Moment of inertia I will be decreased.
Sicne `I=MR^(2)`
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