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 object of mass 7jydnvjg+w/ 6 w,qob+lm:vpf cwu* 8 pdg8oh0 f-nk,yl+vo-.M is released from rest at the top of a frictionless incline. The inclinehas a mass M and makes an angle θ with the horizontal. The incline remains at reston a table as o8k0 ycl*8 ppovhu , .dffv:-g-mwl+n 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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