Description
下旋（后旋）是如何改变球的旋转方向的？为什么球弹出去后还能原路返回？这比你想象的还要奇怪！
轴/译：@贰鼠
How backspin ACTUALLY works - in super slow motion - 2024/07/01
https://www.youtube.com/watch?v=hgcEIKHCI00
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在桌下弹球的视频：BV1Ue411C7KF
诺曼征服时期钢球碰撞烧穿纸张珍贵影像：https://youtu.be/COWOv8aOoSU【P2】
关于网球的论文：https://www.researchgate.net/publication/228634093_Bounce_of_a_spinning_ball_near_normal_incidence
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