如图所示质量为2m的物体a经一轻质弹簧与地面上的质量为3m的物体b相连弹簧的劲度系数为k一条不可伸长的轻绳绕过定�轮一端连物体a另 Template




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tomski如图所示质量为2m的物体a经一轻质弹簧与地面上的质量为3m的物体b相连弹簧的劲度系数为k一条不可伸长的轻绳绕过定�轮一端连物体a另 coloring