[JackG]

It seems to me that even those who have the physics experience to work this type of problem may not be able to do so until they know more of the variables. For instance, what is the weight and size of the soccer ball? How much is it inflated, and therefore what would be its coefficient of constitution? What is the friction between the soccer balls and the carpet? Of course someone with some serious skills in this area could set up the equation in terms of those variables, but we would still need to know this information eventually.

I'd take a crack at this, but this problem is too much for someone who hasn't taken their first college physics class yet.