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 l3g i)xcm; evy+8t(wy (mass = M) is on a track that forms a circular loop olh*a0 ) 9v6 x yryhigj+0x80s vjd.ll(radius = r) in the vertical plane. If the car is to just maintain contact with the track at ty vi6.os8yvj0gll*jd+l)9 x xh0ra0 h he 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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