如图所示物体a和b质量均为m分别与轻绳连接跨过定�轮不计绳与�轮之间的�擦.当用水平变力f拉物体b沿水平方��右做匀速直线运动时下列 Template




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tomski如图所示物体a和b质量均为m分别与轻绳连接跨过定�轮不计绳与�轮之间的�擦.当用水平变力f拉物体b沿水平方��右做匀速直线运动时下列 coloring