自制抛体运动轨迹投影演示器

Homemade projector scope of projectile motion locus

叙述了抛体运动轨迹投影演示器的设计思想、制作方法、应用范围及其特点等内容 。

The article states the design idea,the making method,the range of applying and the characteristic of projector scope of projectile motion locus,and provide an entirely new sort of projector instrument for the middle school teachers.