笔者在平时的教学实践中发现 ,部分学生在学习物理概念的过程中往往存在着死记公式 ,生搬硬套 ,不能正确理解和灵活应用的问题 ,究其原因 ,是他们对概念的内涵和处延理解不清 .下面结合“功”概念应用中常见错误作具体剖析 .[例 1 ]如图 1所示 ,质量为 3ｋｇ的物体由轻绳挂着通 In the usual teaching practice, the author found that some students often have dead-remember formulas in the process of learning physical concepts, and they are unable to correctly understand and apply the problems flexibly. The reason is that they do not understand the concept of connotation and delay. Qing. The following section will analyze the common mistakes in the application of the “work” concept. [Example 1] As shown in Figure 1, a mass of 3kg is hung by a light rope.