本题目来源于试卷: Physics Unit4: Force Dynamics & Newton's Laws,类别为 通用国际物理
[单选题]
Two boxes of masses m a xsf8nu3ywv (23ucy.j0 yqw9h nd 3m are stacked. (See Fig. 4-6 cgw3kn wy53:k .) The surface between the more massive box and the horizontal surface wny c33kgk: w5 is smooth and the surface between the boxes is rough. If the less massive box does not slide on the more massive box, what is the coefficient of static friction between the boxes? 
A. F/(4mg)
B. F/(3mg)
C. F/(2mg)
D. F/(mg)
参考答案: B
本题详细解析:
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