Thank you for your answer :)
So I'm thinking about tennis ball, so i think no permanent significant deformation.
So maybe, my goal is making a program with slow motion about the collide.
Hi
Firstly I'm begginer level at physics, but I'm thinking for days about this problem:
how change tha ball shape when it collide with a wall.
I'm looking for books etc on the net, i found several about deformation but all i found
are very short. The best is write about usually the...