本题目来源于试卷: Rotational Equilibrium，类别为 美国物理杯赛(Physics Bowl)
[单选题]
17.42: A long unifor .g6 kvr3xs3b( lhjd:dm yvppx1v 5h*0m rod, pivoted at one end affixed to the ground, is in static equilibrium A horizontal rope acts 75% of the way up the rod while a vertical rope acts at the 0far end. The magnitude of each rope’s force is the same as the gravitational force acting on the rod. What is the value of the angle θ in the figur xppvm *hy5v1 0e?
A. $18.4^{\circ}$
B. $21.8^{\circ}$
C. $33.7^{\circ}$
D. $36.9^{\circ}$
E. $45.0^{\circ}$
参考答案: C
本题详细解析:
暂无
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