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第五章能量和能量守恒这一章在复习必修课内容的基础上讲解能量和能量守恒。通过本章教学应使学生对机械能概念、动能定理、机械能守恒定律及能的转化和守恒定律有进一步的理解和掌握,并初步学会用能量的观点解释现象、思考问题和解决问题。能的概念是物理学中最重要的基本概念之一,它把广泛的自然现象联系起来。因此,学好本章不但对学好选修课物理有重要意义,对学习其他自然科学知识也有重要意义。认识功和能之间的关系,理解功是能量转化的量度,并能在不同情况下理解和运用,是掌握本章知识的关键。在本章第一节指出,做功的过程,就是能量转化的过程,并按照这一基本
Chapter 5 Conservation of Energy and Energy This chapter explains energy and energy conservation on the basis of reviewing the content of compulsory courses. Teaching through this chapter should enable students to further understand and master the concepts of mechanical energy, kinetic energy theorem, conservation of mechanical energy, and the law of conservation and conversion of energy, and to initially learn to explain phenomena, think about problems, and solve problems with an energy perspective. The concept of energy is one of the most important basic concepts in physics. It links a wide range of natural phenomena. Therefore, learning this chapter not only has important significance for the study of elective physics, but also has important significance for learning other natural sciences. To understand the relationship between work and energy, to understand that work is a measure of energy conversion, and to understand and apply it in different situations, is the key to mastering this chapter’s knowledge. In the first section of this chapter, it is pointed out that the process of doing work is the process of energy transformation, and according to this basic