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第四章 “曲线运动”这一章讲授平抛,斜抛和匀速圆周运动,是前三章知识的具体运用和扩展。在曲线运动中,速度和加速度的矢量性非常明显,通过本章的学习,将使学生对这两个概念的理解进一步加深和扩展;同时,本章把前章学过的牛顿运动定律运用于曲线运动的情形,研究物体做曲线运动的条件,使牛顿运动定律的适用范围也进一步扩展。对于曲线运动的研究,本章是从运动学和动力学两方面来进行的,着重阐明曲线运动的特点和描述方法,分析物体做曲线运动的受力情况,突出牛顿运动定律在曲线运动中的运用,这是贯穿本章教材的基本思想。
The fourth chapter “Curve movement ” This chapter teaches flat throw, oblique throw and uniform circular motion, which is the specific application and expansion of the first three chapters of knowledge. In the curve motion, the vectoriality of speed and acceleration is very obvious. Through the study in this chapter, students will further deepen and expand the understanding of these two concepts. At the same time, this chapter applies the Newton’s law of motion learned in the previous chapter to the curve motion. Situations, studying the conditions of objects doing curved movements, so that the scope of application of Newton’s laws of motion is further expanded. For the study of the curve motion, this chapter is carried out from both kinematics and dynamics. It focuses on clarifying the characteristics and methods of the curve motion, analyzing the stress conditions of objects doing curve motions, and highlighting the application of Newton’s law of motion in curve motion. This is the basic idea of teaching materials throughout the chapter.