1. The problem statement, all variables and given/known data A cart of mass m moves with a speed v on a frictionless air track and collides with an identical cart that is stationary. If the two carts stick together after the collision, what is the final kinetic of the system in terms of m and v? 2. Relevant equations pi=pf 3. The attempt at a solution mivi=mfvf 0=mvf so m=vf is that right?