本题目来源于试卷: Angular Momentum，类别为 美国物理杯赛(Physics Bowl)
[单选题]
03.32: A figure skater has a 1cy;f9 twux0iw7 ni7n r6r3jpmoc0//bamn aj8m ,jjdj 3ment of inertia of $5.0 kg.m{2}$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 change in the skater's angular momentum as she brings her arms in tight to her body?
A. $10 \; kg\;m^{2}/s$
B. $30\;kg\;m^{2}/s$
C. $40\;kg\;m^{2}/s$
D. $120\;kg\;m^{2}/s$
E. No change in angular momentum
参考答案: E
本题详细解析:
暂无
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