phymath01 第18章_分析力学基础(动力学普遍方程_拉格朗日方程)
回答: 物理数学好图 动量的变化表现着力对时间的累积效应,动量的变化与外力的冲量相等;动能的变化表现着力对空间的累积效应,动能的变化与外
由 marketreflections
于 2011-12-01 14:40:36
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