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我们作了改进“平抛运动的竖直分运动是自由落体运动”的演示装置,收到了较好的效果。该装置还可以根据钢球的轨迹直接在黑板上画出平抛运动曲线,从而代替了课本中的闪光照片进行定量分析。若操作仔细,系统误差小于5%。
We have made improvements to the demonstration device of the “vertical sub-movement of flat throw motion is free-fall motion” and received good results. The device can also draw the flat throw motion curve directly on the blackboard according to the trajectory of the steel ball, thereby replacing the flash photo in the textbook for quantitative analysis. If the operation is careful, the system error is less than 5%.