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用能量观点解题是解高中力学问题的三种重要方法之一,也是高中生必须要求掌握的一种方法,并且用能量观点往往比用牛顿运动定律解题要简洁得多,高考中每年都有考到,但很多学生对此法仍然不会用或因常常弄错而不敢用,出现这种现象的原因主要是没有弄清两种关系,即能量转化关系和功能关系,只有弄清了这两种关系,用能量观点解题就可迎刃而解。下面就这两种关系来谈谈。
Using the energy perspective to solve problems is one of the three important methods for solving high school mechanics problems. It is also a method that senior high school students must demand to master, and the use of energy perspectives is often much simpler than solving problems with Newton’s laws of motion. Every year in the college entrance examination There are tests, but many students still do not use this method or because they are often mistakes and can not be used, the main reason for this phenomenon is not to clarify the two relations, that is, energy conversion and functional relations, only to clarify These two relations can be easily solved by solving problems with the energy point of view. Let’s talk about these two relationships.