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 slides downiqe. )h( txf k:z4,yxg a frictionless plane inclined at an anglqzh v kn77mlam+mv1*.e q with the horizontal. The normal reaction force exerted by the plane onlmm qznv1av.mh7 k+7* the block is directed
A. parallel to the plane in the same direction as the movement of the block.
B. parallel to the plane in the opposite direction as the movement of the block
C. perpendicular to the plane.
D. toward the center of the Earth.
参考答案: C
本题详细解析:
暂无
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