浅谈物理常用的思维方法——守恒法

A brief discussion on the usual method of thinking and keeping constant

在讨论一个物理变化过程时,对其中的各个量或量的变化关系进行分析,寻找到整个过程中或过程发生前后存在着的不变关系或不变的量,则成为研究这一变化的过程的中心和关键.这就是物理学中最常用到的一种思维方法---守恒法.所谓"守恒",就是系统内物体之间的某些量要相互传递或物体的某些量要相互转化,但总量保持不变.运用守恒的思想方法解题可以避开状态变化的复杂过程,使问题大大简化.

in the discussion of a process of physical change,the analysis of the changes in the variation of each quantity or quantity in the process is the center and key to the process of studying this change.This is the most commonly used thinking side in physics.The law-conservation law.The so-called "conservation"means that some of the quantities between objects in the system are transferred to each other or the amount of the objects should be converted to each other,but the total amount remains unchanged.