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 M is released 3h; 7aza4q9xe7i:g ok p 9xunk h,m/2mh eyaj)afj (d6from 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 thesmall object slide j)haed (2myj /,a6m hfs. 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
| 
