1. The problem statement, all variables and given/known data If a soccer ball of mass 0.5 kg is kicked with a speed of 14 m/s and hits a rock and is in contact with it for 0.18 seconds, with what force will it hit? 2. Relevant equations Fnet = ma 3. The attempt at a solution I have no idea what to do to get the acceleration for the above formula. It can't possibly be just 14/0.18 can it?