本题目来源于试卷: Typical Forces，类别为 美国物理杯赛(Physics Bowl)
[单选题]
17.40: A small objec zkt 78q5z o9bew,o0d(.ltiin xne 6)v t of mass M is released from rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with w. xtl,i6dnon)0 ei (vthe horizontal. The incline remains at reston a table as thesmall object slides. During the slide, what is the magnitude of the normal force from the table on the incline?
A. 2Mg (1 − tanθ)
B. 2Mg (1 − sinθ)
C. 2Mg
D. Mg (2 − $ sin^{2}$ θ )
E. Mg (2 − sin θ)
参考答案: D
本题详细解析:
暂无
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