Angular Momentum (id: 253f813f8)

本题目来源于试卷: Angular Momentum，类别为 美国物理杯赛(Physics Bowl)

[单选题]
0.33: A figure skater hn tsi,.279ufm85:xpwxq ui(xmcqm 5 eas a moment o,xcko6 6k4jx jt7ih1ff inertia of $5.0kg.m^2$ with her arms outstretched. If she begins a spin at 2.0 rad/s with her arms outstretched and then brings her arms in tight to her body, her rate of spin increases to 8.0 rad/s in 3 seconds. Friction and wind resistance can be considered negligible.
What is the skater's angular acceleration as her arms are moved in during the three second interval?

A. $0.67rad/s^2$
B. $1.7rad/s^2$
C. $2.0rad/s^2$
D. $2.7rad/s^2$
E. $3.3rad/s^2$


参考答案:  C


本题详细解析: 暂无

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