本题目来源于试卷: Rotational Equilibrium，类别为 美国物理杯赛(Physics Bowl)
[单选题]
12.34: A mass m attached to a light string of le j d.wj9-5bg5gq 7zrwv/drl3 o ngth m+ob1 iawqy9/ L is located at an angle θ below the horizontal as shown in the figure to the right. The mass then is released from rest. Calculated from an axis perpendicular to the plane o w+ 9y/qam bo1if the page through the pivot, which one of the following choices represents the magnitude of the torque produced by the gravitational force acting on the mass at this instant?
A. $mgl$
B. $mglsinθ$
C. $mglcosθ$
D. $mgl(1 − sinθ)$
E. $mgl(1 − cosθ)$
参考答案: C
本题详细解析:
暂无
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