从现实生活中的实例谈功能转换——物理教学中功和能关系的分析

On function transformation from real life examples——Analysis of the relation between work and energy in physics teaching

功和能的概念是物理学中最重要、最基本的概念之一,在物理教学中,如何使学生形成清晰的物理概念,准确地掌握物理规律,是物理教学的核心问题.现实生活中功能相互转化的实例很多,通过常见例子具体分析功和能的关系,对合外力、重力和弹簧的弹力做功与机械能的转化、机械能守恒与变化进行分析.

The concept of work and energy is one of the most important and basic physics concepts. In physics teaching, the key issue in Physics Teaching is to have students make a clear physical concept, and accurately grasp the laws of physics. There are many examples of Function Transformation in real life. Taking examples, this article mainly analyzes the relationship of work and energy, the transformation among combined force, gravity, spring stretch, and mechanical energy as well as mechanical energy conservation and changes.