如图所示,质量为m的小球在竖直平面内的光滑圆轨道上做圆周运动

如图所示,质量为m的小球在竖直平面内的光滑圆轨道上做圆周运动.圆半径为R,小球经过圆环最高点时刚好不脱离圆轨.则其通过最高点时(    )

A.小球对圆环的压力大小等于mg

B.小球受到的向心力等于重力

C.小球的线速度大小等于

D.小球的向心加速度大小等于g

 

答案

BCD

解析:略

 

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