1. The problem statement, all variables and given/known data A 4 kg block moving to the right at 6 m/s collides elastically with a 2 kg block moving to the right at 3 m/s. Find the final velocities and the initial and final energies. Show all your work. [ignore external forces] 2. Relevant equations In an elastic collision momentum inital = momentum final and KEi = KEf momentum = mv KE= .5mv^2 3. The attempt at a solution I used these equations and did some algebra but ended up getting too many variables. Am i missing some info here? Thanks.