论文部分内容阅读
初中物理的解题方法有很多,在众多的方法里,极限思维法无疑是一种简单、有效、科学的思想方法,尤其在解物理选择题时,巧妙使用极限法往往可以达到事半功倍的效果。那么,什么是极限思维法呢?简单的说,在解题过程中,假如某物理量在某一区间内是单调连续变化的,我们可以将该物理量或它的变化过程和现象外推到该区域内的极限情况(或极端值),是物理问题的本质迅速暴露出来,再根据已知的经验与事实很快得出规律的认识或作出正确的判断,从而使求解过程简单、直观化。下面笔者就个人的解题经验列举几例极限法在物理解题的应用,愿与大家共同享受科学、简单的解题方法给我们带来的精神体验。
There are many ways to solve problems in junior high school physics. Among many methods, limit thinking is undoubtedly a simple, effective and scientific way of thinking. Especially when solving physical multiple-choice questions, clever use of the limit method can often achieve a multiplier effect. So, what is the limit method? Simply put, if a physical quantity changes continuously monotonically within a certain interval during the process of solving a problem, we can extrapolate the physical quantity or its changes and phenomena to this region. The inner limit (or extreme value) is the nature of the physical problem quickly exposed, and then quickly according to known experience and facts to draw a regular understanding or make a correct judgment, so that the solution process is simple and intuitive. In the following, the author enumerates several examples of the application of the limit method in matter understanding in the personal experience of problem solving. He is willing to enjoy the spiritual experience brought by science and simple problem solving methods together with everyone.