本题目来源于试卷: Rotational Equilibrium，类别为 美国物理杯赛(Physics Bowl)
[单选题]
16.20: A uniform 10. ita vzz:) a 3),r(guaa3( gqmc0 lnc 0vwai;w.. m long plank is pivoted about its center of gravity. A mass M1 then is placed at li 0vnw.ca;.w the left edge of the plank and a second mass M2 is placed 1.0 m from the right end. This system is in static equilibrium (shown). If each mass now is moved 2.0 m closer to the center of the plank, which one of the following choices best describes the subsequent motion of the plank?
A. The plank remains in static equilibrium.
B. The plank rotates at constant angular speed until the right side reaches the ground.
C. The plank rotates at constant angular speed until the left side reaches the ground.
D. The plank angularly accelerates until the right side reaches the ground.
E. The plank angularly accelerates until the left side reaches the ground.
参考答案: E
本题详细解析:
暂无
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