From Steve Mould.

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How does backspin change the direction of a spinning back when it collides with a surface? It’s stranger than you might think!

Here is the ball under a table video:https://youtu.be/g_VxOIlg7q8
Here’s the ball burning paper video from 1000 years ago: https://youtu.be/COWOv8aOoSU

Here’s the paper about tennis: https://www.researchgate.net/publication/228634093_Bounce_of_a_spinning_ball_near_normal_incidence

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