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初中物理第一册第三章《运动和力》主要介绍了运动学和动力学的初步知识;定性地讨论运动状态的改变和外力的关系;简要地描述摩擦及其应用。由于这部分知识,初中阶段叙述得浅显易懂,不少内容高中还要讨论加深。因而,有的认为这一章似乎是可有可无的,没有钻研和探讨的必要。我们认为这是一种片面的观点。本章教材包含一些研究物理学的常用方法,对今后的学习有着深远的影响。本章中关于速度、惯性、平衡力等概念,能否使学生在初中刚学物理时,就能有一个初步确切的认识,乃是学好中学物理的关键之一。本文就备课过程中,
The third chapter of the junior high school physics book “Kinesis and Force” mainly introduces the preliminary knowledge of kinematics and dynamics; qualitatively discusses the relationship between the change of the movement state and the external force; briefly describes the friction and its application. Due to this part of the knowledge, the junior high school stage is easy to understand and many contents are discussed in high school. Therefore, some think that this chapter seems to be dispensable, and there is no need to delve into and explore. We think this is a one-sided view. The textbooks in this chapter contain some common methods for studying physics and have a profound influence on the future. The concepts of speed, inertia, and balance in this chapter can enable students to have a preliminary and accurate understanding of physics in junior high school. This is one of the keys to learning physical physics in middle school. This article is in preparation for the lesson,