A skater rotates at 3 revolutions per second with her arms stretched.

Question

Question

A skater rotates at 3 revolutions per second with her arms stretched. What must she do to decrease her moment of inertia?

Answer 1

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Answer #1

pull her arm in

will reduce here the moment of inertia

because I = m*r²

so you see the moment of inertia depends on distance so if she bring her arms closer to axis moment of inertia decreases

Answer 2

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