1. The problem statement, all variables and given/known data Two bodies of masses M1& M2 resting on frictionless surface. Bodies touch each other without any friction. What will be the force between the bodies, If they are pushed from one end with force F and both are accelerating towards other end? Answer given is (M2 x F)/(M1+M2). How is it arrived at? 2. Relevant equations F= G M1XM2/ distance squared 3. The attempt at a solution I am stumped. I cannot arrive at this with above equation.