关于动量守恒定律的讨论

The Discussion on the Theorem of Momentum of Conservation

从拉格朗日方程出发，推导出广义动量守恒定律，并对其加以讨论．如果广义坐标反映力学系统的整体平动，则广义动量守恒定律就可以表示为线动量守恒定律；如果广义坐标反映力学系统的整体转动，则广义动量守恒定律就可以表示为角动量守恒定律，从而说明广义动量守恒定律是最普遍的动员守恒定律．

In the paper, according to language's equations, we get the generalizedtheorem of momentum of conservation, and through discussion. We know if generalizedcoordinates express a mechanics system's total translation, the theorem is able to be ex-pressed as the linear theorem of momentum of conservation. If generalized coordinatesexpress the total rotation, that theorem is able to expressed as the angular theorem ofmomentum of conservation. Those tell us that generalized theorem of momentum ofconservation is the most general theorem of momentum of conservation principal-