5.如图所示质量为m的小球在竖直平面内的光�圆轨道上做圆�运动.圆半径为r小球经过圆环最高点时刚好不脱离圆轨.则其通过最高点时说法错误的是 Template




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tomski5.如图所示质量为m的小球在竖直平面内的光�圆轨道上做圆�运动.圆半径为r小球经过圆环最高点时刚好不脱离圆轨.则其通过最高点时说法错误的是 coloring