Block A with a mass of 9.0 kg moves along the x axis with a velocityof 6.0 m/s(in the positive x direction.) It suffers an ellastic collision with block B (15.0 kg), which initially has a velocity of -2.0 m/s(in the negative x direction). The blocks leave the collision along the x axis.
what is the initial kinetic energy of the system?
what is the initial momentum of the system?
what is the velocity of the blocks after the collision?