“碰撞”是现行高中物理新课程标准中的选修内容,课堂中要演示质量相等的两个钢球作弹性碰撞时的速度交换.多数老师用 flash 课件代替演示这个实验,不能使学生得到亲身体会,其原因是实验器材难以制作,下面介绍一种制作牛顿摆的方法. “Collision” is the elective content of the current high school physics new curriculum standard. In the classroom, it is necessary to demonstrate the exchange of speeds when two steel balls of equal quality are used for elastic collision. Most teachers use flash courseware instead of demonstrating this experiment, and students cannot get it. Personal experience, the reason is that experimental equipment is difficult to produce, the following describes a method of making Newton pendulum.