Physics Unit4: Force Dynamics & Newton's Laws (id: 18d37c950)

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]
A block of mass M slides8+r/avkz(9x +mp fsfz 4 0aukk down45vr y tw*a/ap a frictionless plane inclined at an angle q with the horizontal. The normal4vp a*arw/5yt reaction force exerted by the plane on the block is

A. $Mg$
B. $Mg \; \sin(q)$
C. $Mg \; \cos(q)$
D. zero, since the plane is frictionless.


参考答案:  C


本题详细解析: 暂无

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