D Diana New member Jul 13, 2009 #1 A railroad car with a mass of 5.0 x 10^5 kg collides with a stationary railroad car of equal mass. After the collision, the two cars lock together and move off at 4.0 m/s. Find the kinetic energies of the two cars before and after the collision.
A railroad car with a mass of 5.0 x 10^5 kg collides with a stationary railroad car of equal mass. After the collision, the two cars lock together and move off at 4.0 m/s. Find the kinetic energies of the two cars before and after the collision.
