Question

two cars of equal mass m = 0.250 kg are placed on a fricitionless track that has a light spring of force constant k = 50.0n/m attaced to one end of it as vo= 3.00m/s to the right and the blue cars is intitially at rest if the cars collide elastically find a ) the velocity of the cars just after the first collision and b) the maximum compression of the spring