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所谓等效思想,就是人们研究事物及其运动时从总体出发,重点考虑最后结果而忽略事物运动发展中的细节,在两个不同事物或运动具有相同的功能效果时使二者相互代替的思想方法.等效思想在物理解题中也有广泛的应用,主要有物理模型、物理过程、作用效果的等效替代.在应用等效法解题时,应知道两个事物的等效不是全方位的,只是局部的、特定的、某一方面的等效.因此在具体问题中必须明确哪一方面等效,这样才能把握住等效的条件和范围.一、物理过程的等效:把复杂过程等效为几个简单的物理过程在处理一些复杂的物理过程时,经常把它等效地
The so-called equivalent idea is that when people study things and their movements from the general starting point, they must consider the final result and ignore the details in the development of the movement of things. When two different things or movements have the same functional effect, the two are replaced by each other. Methods. Equivalent ideas are also widely used in physical understanding problems. They mainly include physical models, physical processes, and equivalent substitutions of effect effects. When using the equivalent method to solve problems, it should be known that the equivalence of two things is not all-encompassing. , It is only partial, specific, and equivalence in one aspect. Therefore, it is necessary to clarify which aspect is equivalent in the specific problem, so as to grasp the equivalent conditions and scope. First, the equivalence of physical processes: the complex process Equivalent to several simple physical processes, when dealing with some complex physical processes, it is often equivalent