One sunny day, Peter and Patty were running in the same direction at 2.80 m: and 5.00 mfg, respectively. a} As Peter tried to overtake Patty. they collided, remained in contact, and moved at 3.50 m/s after collision. If Patty's mass is 40.0 kg, what is the mass of Peter? b} This time, Peter ran 5.00 m/s to the right while Patty ran 3.55 mfs in the opposite direction. and collided head on. Afler collision, Peter moved 1.18 m/s to the left. Find Patty's velocity (magnitude and direction) after collision