物理中的等效法是把复杂的物理现象、物理过程简单化,从而来研究和处理问题的一种思维方法.大多数物理概念的建立,可以说是运用某种等效思维方法研究物理问题的结果.例如:力学中引出的重心概念,就是将地球对物体各部分的引力等效地看成集中于某一点(重心)上;热学中引出的气体压 The equivalence method in physics is a kind of thinking method that simplifies the complex physical phenomena and physical processes so as to study and deal with problems. The establishment of most physical concepts can be described as the use of an equivalent thinking method to study physical problems. Results. For example, the concept of gravity centered in mechanics is the idea that the Earth’s gravitational equivalent of each part of an object is considered to be concentrated on a certain point (the center of gravity); the gas pressure induced by the heat