1. The problem statement, all variables and given/known data So I have to do a report about tennis and about the spin. I understand how the magnus effect works and how the ball will bounce but am still unable to figure out how the actual spin is created by the contact with the racquet and the moving ball 2. Relevant equations T=Fr 3. The attempt at a solution I have looked online and found out it has to do with the friction between the ball and the racquet while they are in contact with each other. The friction has to do with the movement in the collision where the racquet will essentially 'slide' while in contact with the ball. I just don't understand which direction this friction would be in and if there are any other factors which effect it the spin. Also how is the spin actually created.