牛顿第二定律不仅是动力学的核心规律,也是整个高中物理学习的基础,集聚了物理思想方法和解题技巧.“一致性”是牛顿第二定律对外表现最为显性化的特点,一个力的作用与其产生加速度的效果存在着瞬时的因果规律,表现为对象上的一致性、时间上的同时性和空间上的同向.本文结合具体的例题谈基于牛顿第二定律的“一致性”特征应采取的解题方法和策略,希望能有助于教学.一、基于对象上的一致性科学选择研究对象运用牛顿第二定律时,合外力及其产生的加速度在对象上是一致的,为此,解决连接体问题时应抓住主要特征,科学地选择研究对象,确保解题的顺利 Newton’s second law is not only the core law of dynamics, but also the basis of the entire high school physics study, which integrates the methods of physics thinking and problem solving skills. “Consistency” is the most explicit feature of Newton’s second law, The instantaneous causality exists between the effect of a force and the effect of its acceleration, which is expressed as the consistency of objects, the simultaneity of time and the same direction of space.In this paper, based on a specific example, Consistency "should be taken to solve the problem solving methods and strategies, hoping to contribute to teaching.A first, based on the consistency of the object of science to select the research object using Newton’s second law, the combined force and its acceleration in the object Is consistent, therefore, to solve the connector problem should seize the main features of scientific research to select the object to ensure that the solution