Opening/Closing Arms on Rotating Stool
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Opening/Closing Arms on Rotating Stool
5 문제점
문제 1객관식
A figure skater has her arms extended outwards at her sides, while spinning at a rate of 1.2 rev/s. If she pulls her arms close to her body, the rotation speed will increase to 1.8 rev/s.
(a) Why does the rotation speed increase?
(b) Express her final moment of inertia in terms of her initial moment of inertia.
