Two balls strike each other in a nearly head-on collision. The figure below shows the momentum of Ball 1 (p1,;) and the momentum of Ball 2 (p2,;) before the collision, and the momentum of Ball 1 (p1,() after the collision. There are no forces acting on the balls, except the collision forces. PIf Pli Pzi If the magnitude of vector p1,; is 73kg m/s, what is the magnitude of the final momentum of ball 2 (p2,f)? Give your answer in kg m/s to three significant figures (without units)