非惯性系中的动量定理与动量守恒  

Momentum Theorem and Momentum Conservation in Non-Inertial System

作　　者：李铁[1] 

机构地区：[1]重庆工学院数理学院,重庆400050

出　　处：《电子科技大学学报》2004年第5期623-626,共4页Journal of University of Electronic Science and Technology of China

摘　　要：在经典力学框架下,推导出了既有平动、又有转动的一般非惯性系中动量定理的表达式。讨论了一般非惯性系中动量守恒的条件。通过考察非惯性系中一个不受相互作用外力的物体系统的运动过程,举例阐述了对“封闭系统”动量守恒的认识。指出了由于惯性力起着与外力相同的作用,因此相对于非惯性系,封闭的物体系统是不存在的。Under the classical mechanics frame, this paper derive the expression of momentum theorem and deliberate the condition of momentum conservation in a general non-inertial frame, in translation and rotational motion. Then this paper formulize the cognition of momentum conservation on 'close system' through surveying the motion in a system that hasnt any interaction with outside force in non-inertial system. As a result, it is pointed out clearly that since inertia force takes the role similar to outside force, therefore, closed system does not exist relative to non-inertia system.

关 键 词：非惯性系 动量定理 动量守恒 封闭系统 

分 类 号：O313[理学—一般力学与力学基础]