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A spinning ice skater is able to control the rate at which she rotates by pulling in her arms. ...

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A spinning ice skater is able to control the rate at which she rotates by pulling in her arms. ...

A spinning ice skater is able to control the rate at which she rotates by pulling in her arms. Which of the following statements are true about the skater during this process? (There could be more than one correct choice.)
A) Her angular momentum remains almost constant.
B) Her moment of inertia remains almost constant.
C) Her kinetic energy remains almost constant.
D) She is subject to a constant non-zero torque.

Textbook

College Physics

Edition: 1^st

Authors: Etkina, Gentile, Van Heuvelen

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