对变质量系统功能原理的讨论

A Discussion On The Function Theory of Variable And Momentum System

本文就动力学中常见的非封闭系统由于质量的进出而引起的动量改变和能量损失 ,运用牛顿第二定律和封闭系统的功能原理 ,阐述了非封闭系统的功能原理及动能损失。

It is common that momentum usually changes and energy loses resulting from the turnover of quality in non-obturating system in dynamics.Therefore,this paper,by using Newton LawⅡ and the function theory of obturating system,expounds the function theory of non-obturating system and the loss of energy.