本题目来源于试卷: Physics Unit8: Rotational Motion，类别为 通用国际物理
[单选题]
An ice skater performs a pirouette (a :h j s88tg5 kkrvde mmcc-/13wfast spin) by pullingzu-+; e+rzy9,q oarym in his outstretched arms close to his body. What happens to his rotation+zr-m,uqy9 ey o arz;+al kinetic energy about the axis of rotation?
A. It does not change.
B. It increases.
C. It decreases.
D. It changes, but it is impossible to tell which way.
参考答案: B
本题详细解析:
暂无
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