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A figure skater is spinning slowly with arms outstretched. She brings her arms in close to her body and her moment of inertia decreases by 1/2. Her angular speed increases by a factor of

A) 2.
B) 4.
C) .
D) 1
E) 1/2.

Marked as best answer by Yoshie

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A

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Merci beaucoup! <3