一、教学目的要求高中物理机械能一章,经过改编后,内容有所增加,在研究问题的观点和方法上也有所提高。例如引入重力势能时,首先讨论了重力做功的特点,运用图解法分析变力的功时包含了积分的初步概念,讲功、能时,没有采用“能是量度物体做功本领大小的物理量”的说法。由于机械能守恒定律是能的转化和守恒定律在机械运动中的体现,而能的转化和守恒定律是自然界最普遍的规律之一,它的内容贯串在整个物理学中,是联系物理学各部分知识的纽带。因此,这章教材既是 First, the purpose of teaching requires that the physical mechanical energy of high school chapter, after reorganization, the content has increased, in the perspective of research issues and methods have also been improved. For example, when introducing gravitational potential energy, the characteristics of gravitational work are first discussed, and the use of graphical methods to analyze the work of inverting power includes the initial concept of integration. When working and performing, there is no use of “a physical quantity that can measure the power of an object”. statement. Since the law of conservation of mechanical energy is a manifestation of the transformation and conservation laws of energy in mechanical movements, the law of energy conversion and conservation is one of the most common laws in nature. Its content is in line with the entire physics and it is related to all parts of physics. The bond of knowledge. Therefore, this chapter is not only