简易平抛运动实验的改进

An Improvement in the Experiment of Simple Horizontal Cast Movement

针对高中物理"平抛运动实验"中描点效果不理想这一缺点,在原来实验装置的基础上进行改进,利用平行光把小球的影子投射到带有坐标的纸上,方便找点;由于小球运动较快,对于同一个点,可采用逐步缩小范围的方法确定点和坐标,改进后,实验装置操作简便,运动轨迹描绘准确。

Abstract In order to overcome the shortcoming which the tracing point is not ideal in the old horizontal cast movement experiment, the author designed a kind of simple and exact device. On the basis of old experiment device, parallel lights are added to project the shadow of the ball in the coordinate paper. As the result of the fast speed, the same tracing point of the ball is confirmed directly by reducing the range gradually.