本题目来源于试卷: Angular Momentum，类别为 美国物理杯赛(Physics Bowl)
[单选题]
17.24: What condition must be met for the angular momnc6rw5ewq p,gq(z2 )w entum of a system to be t-f x(4wtz5u3p5cjmg da.mp5 consjtd upmft5cgz5w 3xp(- m a4.5tant?
A. The mechanical energy is constant.
B. There is no net external force acting on the system.
C. The system is in static equilibrium.
D. There is no net external torque acting on the system.
E. Only the gravitational force is acting on the system.
参考答案: D
本题详细解析:
暂无
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