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A person is standing on a rotating platf...

A person is standing on a rotating platform, with his arms at his sides. If he stretches his arms, then which of the following statements is correct?

A

The ratio`[frac{I}{K}]` remains constant, where / is the moment of inertia & K is the kinetic energy.

B

Rotational inertia decreases

C

Kinetic energy increases

D

Kinetic energy decreases, because work is done by the muscles of the person

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