1. The problem statement, all variables and given/known data Particle 1 of mass m1 = 0.30 kg slides rightward along an x axis on a frictionless floor with a speed of 2.0 m/s. When it reaches x = 0, it undergoes a one-dimensional elastic collision with stationary particle 2 of mass m2 = 0.40 kg. When particle 2 then reaches a wall at xw = 70 cm, it bounces from it with no loss of speed. At what position on the x axis does particle 2 then collide with particle 1? 2. Relevant equations 1/2m1v1i^2 = 1/2m1v1f^2 + 1/2m2v2f^2 3. The attempt at a solution[/b I found all the values in the equation however, I don't know how to apply that to figure out the position where they will collide.