Circular Motion (id: 661e84940)

本题目来源于试卷: Circular Motion，类别为 美国物理杯赛(Physics Bowl)

[单选题]
17.10: A 2000 kg car m4n /.yohfdc h jo9:e-qoves over evtdr6 h.r8gre,v 30na hill at a constant speed of 12.0 m/s. At the very top of the hill, the shape of the road can be approximated as a circle with radius 25 m, as indicated in the figure. Whiche3.8rd,v0 g6tvenr rh one of the following choices best represents the magnitude of the upward force exerted by the road on the car?

A. 0 N
B. 8.5 kN
C. 11.5 kN
D. 20.0 kN
E. 31.5 kN


参考答案:  B


本题详细解析: 暂无

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