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人教版高中物理(必修2),第七章《机械能守恒定律》,相对于传统教材,最显著的变化是增加《追寻守恒量——能量》、《实验:探究功与速度变化的关系》两节内容.如果采用“功和能”传统的处理手法,《追寻守恒量——能量》不作讲解,《探究功与速度变化的关系》解读为《探究动能定理》,这是教师没有领悟到本章教材的精髓!本文就抛砖引玉,重点对《追寻守恒量——能量》一节进行赏析.一、从“功”和“能”到以“能量”为核心
People’s Education Edition High School Physics (compulsory 2), Chapter VII “Law of Conservation of Mechanical Energy”, compared with the traditional teaching materials, the most significant change is to increase the “pursuit of conservation - energy”, “Experiment: Exploring the relationship between power and speed” If we use the traditional method of “power and energy”, “chasing the quantity of conservation - energy” is not to explain, “to explore the relationship between power and speed changes,” interpreted as “kinetic energy theorem”, which is the teacher did not I realized that the essence of this chapter teaching materials! This article is to start a discussion, focusing on the “pursuit of the amount of conservation - energy” a section of appreciation.First, from “power” and “energy” to “energy” as the core