机械能守恒定律是高中物理人教版必修2第七章第8节的内容。机械能守恒定律是力学中的一条重要定律,是更普遍的能量转化和守恒定律的一种特殊情况。它的内容是:在只有重力或弹力做功的物体系统内,动能和势能可以相互转化,而总的机械能保持不变。它是学生进入高中以来学习到的第一个守恒定律,理解起来难度颇大,建立守恒的思 The law of conservation of mechanical energy is the content of Chapter 8, Chapter 7, Compulsory 2 of the Physics PEP. The law of conservation of mechanical energy is an important law in mechanics and is a special case of the more general law of energy conversion and conservation. Its content is: kinetic energy and potential energy can be transformed into each other in the system of objects that do work only with gravity or elasticity, while the total mechanical energy remains unchanged. It is the first law of conservation that students have learned since entering high school, and it is difficult to understand