Py (kg-m/s) 5. A 500-g ball traveling to the right at 8.0 m/s collides with and bounces off another ball, which was at rest. The figure shows the momentum vector p, of the first ball after the collision. Draw the momentum vector p2 of the second ball. One unit on the graph is 1 kg . . Px (kg-m/s) 4 x 0.5 = 2 2, 3 500g = 0.5kg I = 0.[x 8 = 4kgmls raveling to the right at 4.0 m/s collides with Py (kg.m/s) o ball