机械能知识是高中物理力学部分的重点和难点,为透彻理解有关物体动能、势能的相关概念以及影响它们大小的因素,笔者采取不同方法对同一个有关机械能知识的具体问题进行了解析,结果显示,机械能问题的处理方法很多,视角不同,往往会有不同的效果,图象分析法形象直观易懂,有时可带来别具洞天的解题功效。 Knowledge of mechanical energy is the key and difficult part of physics mechanics in high school. To understand the related concepts about kinetic energy and potential energy of objects and the factors that affect their size, the author analyzes the specific problems about the same knowledge about mechanical energy with different methods. There are many ways to deal with mechanical energy problems, different perspectives, often have different effects, image analysis method intuitive and easy to understand, and sometimes can bring unique solutions to problems.