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 move hh* 0obhn hl+n.cm84h s over a hill at a cons th:vio()a2kkn b(0 3qpw01 too n ef+vtant 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. Which one of t iv b32efk) ohvn o 0k(w0aqp(nt+:1tohe 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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