本题目来源于试卷: Physics Unit4: Force Dynamics & Newton's Laws,类别为 国际高中通用物理
[单选题]
Two boxes of masses pz,qzu/yos+* m and 3m are sta xxo*4kpa rx0fx.,i1ep- ay 1icked. (See Fig. 4-6.) The surface between the more massive bo 1y-4xrik*aiopaxp . ef xx0 ,1x and the horizontal surface 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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