posted by Lauren .
A car (mass = 1180 kg) is traveling at 36 m/s when it collides head-on with a sport utility vehicle (mass = 2380 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?
If the collided vehicles both come to a stop (stuck together), the initial momenta must be equal and opposite.