在初中力学这个知识层次上 ,要应用所学知识解决一些简单的综合性的问题。一般从以下四步骤进行分析。但是 ,不是所有的目都要分析四步。首先 :明确研究对象 ,因为在一些题目中受力的物体往往不止一个 ,因此 ,必须弄清题目要求分析的对象 ,把它从众多的物体中隔离出来。若研究 In the knowledge level of junior middle school mechanics, we must apply what we have learned to solve some simple and comprehensive problems. It is generally analyzed from the following four steps. However, not all goals have to be analyzed in four steps. First of all: a clear study of the object, because there are often more than one object in some problems, therefore, we must find out the object of the analysis required by the title, and isolate it from the numerous objects. If research