Two cars collide with each other. before the collision, one car (m = 1100 kg) is going north at 18 m/s and the other car (m = 1300 kg) is going south at 16 m/s. what is the momentum of the system made up of the two cars after the collision?

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.