机械能守恒定律是高中力学的重要内容,在实际教学中,常发现一些学生死记硬背该定律,因而不能灵活运用,并时常与功能原理、能量守恒定律相混淆。其原因是没能准确理解定律的内涵。本文结合实例谈谈机械能守恒定律的理解与应用。 The law of conservation of mechanical energy is an important part of high school mechanics. In actual teaching, some students are often found in the law of rote memorization and can not be flexibly applied. They are often confused with the principle of function and the law of conservation of energy. The reason is the failure to accurately understand the meaning of the law. This article with examples to talk about the conservation of mechanical energy understanding and application.