本题目来源于试卷: Physics Unit5: Circular Motion & Gravitation，类别为 通用国际物理
[单选题]
A roller coaster carlm0mzdt9n 4 sx4v3w m0 (mass 0/0 6hhw4vdhwj3lpx/f p h 9yus71e du= M) is on a track that forms a circular loop (radius = r) in the vertical plane. If the car is to just mf0uuvj/d1l/9 pdhw3 wysx4p eh7h06h aintain contact with the track at the top of the loop, what is the minimum value for its speed at that point?
A. $rg$
B. $\sqrt{rg}$
C. $\sqrt{2rg}$
D. $\sqrt{0.5rg}$
参考答案: B
本题详细解析:
暂无
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