机械能守恒定律的局限性

机械能守恒定律是力学中的一条重要定律,但它不是一个基本的普适性定律,它的成立与惯性系的选取有关,原因是机械能守恒定律成立的条件为：“只有保守的内力做功,”而保守的内力是物体系内的相互作用力,对于其中任何一个力做的功,由动能定理可知,此力所做的功对不同的惯性系,其值是不同的,做功的多少与惯性系的选择有关,这就造成了机械能守恒定律的局限性。

The limitation of mechanical energy conservation law

The law of mechanical energy conservation is an important law in mechanics,but it is not a basic and catholic law,which is established in inertia of terms,because the establishment of the law conservation of mechanical energy is:"only the inner conservative force doing the work",but inner conservative force is interactive.Whichever doing work according to the kinetic energy axioms,the works are diverse to different inertia,this result localization of the law.