牛顿第二定律揭示了力与运动的关系,是动力学的核心内容.同学们在运用这一规律解题时,除正确理解定律的内容外,还应掌握一些基本的方法.具体有:一、整体法与隔离法选取研究对象是解题的首要环节.若研究对象是两个或两个以上相互作用的系统,一般由整体法求外力,用隔离法求内力.若外力已知,则由整体法求加速度. Newton’s second law reveals the relationship between force and movement and is the core content of dynamics. When students use this law to solve problems, in addition to the correct understanding of the content of the law, they should also grasp some basic methods. Specifically: , The holistic method and isolation method select the research object as the first link of the problem. If the object of the study is two or more interacting systems, the external force is generally obtained by the holistic method, and the internal force is obtained by the isolation method. If the external force is known, Acceleration by the holistic approach.