变速运动一章研究的是质点运动学的基础知识,是力学的重要组成部分。是学习以后几章的基础。其重点是匀速直线运动和匀变速直线运动、矢量的合成与分解则是学习本章的主要方法,是本章教学的难点。矢量贯穿于整个物理教学中,本章涉及的基本概念位移、速度、加速度等物理量都是矢量。为解决矢量计算问题,就得应用矢量的加减计算法则。但学生往往不明确一个 The chapter on variable-speed motion studies the basics of particle kinematics and is an important part of mechanics. Is to learn the next few chapters. The focus is uniform linear motion and uniform linear motion, vector synthesis and decomposition is the main method of learning this chapter is the difficulty of teaching in this chapter. Throughout the physics teaching vector, the basic concepts involved in this chapter displacement, velocity, acceleration and other physical quantities are vectors. To solve the problem of vector calculation, you have to apply the vector addition and subtraction algorithm. But students are often not clear one