1. The problem statement, all variables and given/known data Car A with mass 1000 kg is accelerating at 1ms-2 at car B. Car B with mass 1000 kg is accelerating at 1ms-2 at car A. What is the force on car B at the collision? 2. Relevant equations F = ma Newton's third law 3. The attempt at a solution Car A force: F = ma F = 1000 x 1 F = 1000 N Car B force: F = ma F = 1000 x 1 F = 1000 N Then using newton's third law, since every action has an equal opposite reaction force, if car B was colliding with a stationary object then the force on car B after colliding is 1000 N. But since car A is travelling at car B with 1000 N of force then that also has to be added into car B's total collision force. So therefore car B has a total collision force of 2000 N. Is the answer right? Also is my explanation correct?