牛顿第二定律与质点力平衡  

Newton’s Second Law and the Force Balance of Particle

作　　者：谷云高[1] 史书惠[1] 郭宏俊[1] 

机构地区：[1]邯郸学院物理系,河北邯郸056005

出　　处：《邯郸学院学报》2005年第3期58-59,共2页Journal of Handan University

摘　　要：牛顿第二定律F=ma是经典力学的基础定律,它给出了物体运动状态的变化与外力的定量关系.这篇文章重点分析对于一个加速度不为零的质点如何利用力平衡使问题简化,并得出结论——沿加速度平行方向合力投影与加速度满足牛顿第二定律;沿垂直于加速度方向合力投影是平衡力.Newton＇s second law F=ma is a fundamental law of classical mechanics, which have discovered the quantitative relationship between the variation in motion of the object and the extemal force. The particle analyzed a particle whose acceleration not order for zero, in a certain way the article make use of the equilibrium result in dint make problem simplification and get a conclusion to cooperate the projection along the parallel direction in acceleration and the acceleration satisfy Newton the second laws, cooperate in the acceleration direction along the perpendicularity the projection is an equilibrant.

关 键 词：叠加原理 加速度 正交分解 单摆 

分 类 号：O313.1[理学—一般力学与力学基础]