Physics Homework Help -- Force when kicking a ball 1. The problem statement, all variables and given/known data I have a few physics problems on my homework, I need help. A player kicks a 0.5kg ball with a force of 50N, what is the force on his foot? 2. Relevant equations F = Mass * Acceleration 3. The attempt at a solution I was thinking either 50N or 25N would be the solution because when I think of it logically, a 1kg ball would hit my foot harder, but also that could be because force of friction.. If there was no friction on the ground.. it would be 50N right?