Two blocks can collide in a one-dimensional collision. The block on the left hass a mass of 0.50 kg and is initially moving to the right at 2.4 m/s toward a second block of mass 0.80 kg that is initially at rest. When the blocks collide, a cocked spring releases 1.2 J of energy into the system. (a) What is the velocity of the first block after the collision? (b) What is the velocity of the second block after the collision? I don't know what to do. I assume equal momentum is given by the spring to each block, but i tried working out the momentum given to the system by pretending it was 1 big block and working out the KE and so the momentum. I though this was the momentum given to each block so worked out the velocity given to each block by the spring and adding it on to the two velocities i found using simultaneous equations of momentum and kinetic energy. It didn't work :(. I don't know what else to do without knowing how the energy is distributed between the two blocks.