如图所示有ab两个质量相等的光��属球放在同一水平面上.a沿高为h的光�斜面滚下b从h高处竖直落下到达cd平面的d处这时两球速度 Template




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tomski如图所示有ab两个质量相等的光��属球放在同一水平面上.a沿高为h的光�斜面滚下b从h高处竖直落下到达cd平面的d处这时两球速度 coloring