本题目来源于试卷: Physics Unit5: Circular Motion & Gravitation，类别为 国际高中通用物理
[单选题]
A roller coaster car (mass = M) is on amsz1*w80/ zedpqi xnmt:r0hh8*s/ t j kwq6:a7 +y7;ijau-9l bcevhq track that forms a circular loop (radius = r) in the vertical plane. If the ca c7;-bvay +ueq9kj6wih:qal7r is to just maintain 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
| 
