An experiment is described where three different spinning balls were dropped vertically on a horizontal surface, and the bounce was filmed with a video camera. The change in spin and horizontal speed of each ball was estimated theoretically, using equations familiar to physics students. The experiment provides an extension of the usual student exercise where a non-spinning ball is dropped vertically on a surface to measure the coefficient of restitution.

中文翻译：

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旋转球的垂直反弹

描述了一个实验，其中将三个不同的旋转球垂直放置在水平表面上，然后用摄像机拍摄弹跳。使用物理学生熟悉的方程，从理论上估算每个球的旋转和水平速度的变化。该实验提供了普通学生练习的一种扩展方式，在该练习中，将非旋转的球垂直放置在表面上以测量恢复力系数。