微元思维方法在物理解题中的应用

• 作 者: 蔡才福
• 出 处: 新高考(物理化学生物)
• 发表日期: 2007年Z2期
• 关键词: 思维方法 微元法 事物整体 动摩擦因数 牛顿第三定律 对称法 横截面积 化变 合外力 自由电荷

所谓微元思维方法,是指从整体中选取某个特定的微小部分作为研究对象,从而达到解决事物整体问题的一种思维方式,是分析、解决物理问题中的常用方法.我们在研究物理问题时,对于某一具体的研究对象,当从整体上或宏观上难以求解时,运用微元思维方法,往往会化动为静,化变为不变,化曲为直,从而得到化难为易,化繁为简的效果.

The so-called micro-mind thinking method refers to a specific micro-section selected from the whole as a research object, so as to achieve a way of thinking to solve the whole problem of things, and it is a common method for analyzing and solving physical problems. We are studying the physics problem. At the time, for a specific research object, when it is difficult to solve either as a whole or macroscopically, the use of the micro-element thinking method tends to change to static, change to constant, and change the curvature to straight, so that it becomes difficult to understand. , the effect of many simple things.