如图所示质量均为m两个物块a和b用劲度系数为k的轻弹簧连接处于静止状态.现用一竖直�上的恒力f拉物块a使a竖直�上运动直到物块b刚要 Template




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tomski如图所示质量均为m两个物块a和b用劲度系数为k的轻弹簧连接处于静止状态.现用一竖直�上的恒力f拉物块a使a竖直�上运动直到物块b刚要 coloring