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 moves over id1j/evjj;ja 723i vna hill at a constant speed of ;qq ohhw6vr 2qav8 )3x12.0 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. Which one of the following choices best represents the magnitude of the upward force exerted w2hr)vq hav38q;q 6x o 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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