平抛运动演示仪的创新与自制

Innovation and Self-made on Demonstrator of Horizontal Projectile Motion

现有的平抛运动演示仪存在实验现象不直观、操作繁琐耗时长、器材昂贵等缺点,因此,选择生活中常见的器材自制教具.巧妙地利用联动装置保证了小球同时运动,生动形象地演示平抛运动在水平和竖直方向的运动情况,同时利用磁性小球和磁性画板描绘其运动轨迹.能使学生直观明了地观察到做平抛运动的物体的运动轨迹,同时教具操作简单方便,经久耐用.

The existing flat throwing motion demonstrator has the defects of non-intuitive experiment phenomenon,complicated operation,long time consumption,expensive equipment and the like,so common equipment in life is selected to self-made teaching aids.Clever use of linkage device ensures the ball moves at the same time,vividly demonstrates the horizontal and vertical movement of the horizontal throwing movement,and at the same time uses magnetic ball and magnetic drawing board to depict its movement track.The invention can enable students to intuitively and clearly observe the motion track of objects performing flat throwing motion,and meanwhile,the teaching aid is simple and convenient to operate and durable.