如图所示竖直平面内的四分之一圆弧轨道下端与水平桌面相切小�块a和b分别静止在圆弧轨道的最高点和最低点现将a无初速度释放a与b碰撞后结合 Template




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tomski如图所示竖直平面内的四分之一圆弧轨道下端与水平桌面相切小�块a和b分别静止在圆弧轨道的最高点和最低点现将a无初速度释放a与b碰撞后结合 coloring