等效思维是抽象思维与形象思维互相交叉、互相渗透的一种科学方法。这种思维方式渗透在中学物理的各阶段,如初中课本中的串、并联电路的总电阻,高中课本中的力的合成与分解、重心、验证动量守恒定律实验中用位移替代速度以及交流电的有效值等等都是用专题介绍等效方法。等效思维的培养有助于我们通过表象去比较、鉴别、归纳,做到一题多解,举一反三,达到化繁为简的功 Equivalent thinking is a scientific method that abstract thinking and image thinking cross each other and infiltrate each other. This way of thinking penetrates into all stages of middle school physics, such as the total resistance of strings and parallel circuits in junior high school textbooks, the synthesis and decomposition of forces in high school textbooks, the center of gravity, and the use of displacement substitution speeds and alternating currents in experiments to verify the law of conservation of momentum. Effective values ​​and so on are all presented using the equivalent method of presentation. The cultivation of equivalent thinking helps us to compare, discriminate and generalize through appearances, achieve multiple solutions to one question, and infer one thing from another, so as to achieve the function of simplifying and simplifying