如图2所示在水平面上�右运动的物体质量为20 kg 物体与水平面间的动�擦因数为01 在运动过程中还受到一个�左的10 N的水平拉力 Template




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tomski如图2所示在水平面上�右运动的物体质量为20 kg 物体与水平面间的动�擦因数为01 coloring