> You don't need to consider every atom of the ball or even every atom of the air. You need only some simply equations like F=mg and > -px=px when reaching the wall and the like. No human being ever calcuted or even tried to calculate a bouncing ball EXACTLY.
I guess it wasn't obvious enough that I was joking. It is, of course, impossible to model every atom, as there are no existing computers with enough memory (much less speed, etc.) to handle such a problem.