如图所示位于竖直平面内的光�轨道有一段斜的直轨道和与之相切的圆形轨道连接而成圆形轨道的半径为r一质量为m的小物块从斜轨道上某处由静止 Template




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tomski如图所示位于竖直平面内的光�轨道有一段斜的直轨道和与之相切的圆形轨道连接而成圆形轨道的半径为r一质量为m的小物块从斜轨道上某处由静止 coloring