如图所示一个内壁光�的圆锥筒的轴线垂直于水平面圆锥筒固定不动有两个质量相同的小球a和b紧贴着内壁分别在所示的水平面内做匀速圆�运动则 Template




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tomski如图所示一个内壁光�的圆锥筒的轴线垂直于水平面圆锥筒固定不动有两个质量相同的小球a和b紧贴着内壁分别在所示的水平面内做匀速圆�运动则 coloring