A 80.0 kg paint cart with rubber bumpers is rolling at 0.965 m/s to the right and strikes a second cart of mass 92.0 kg moving 1.30 m/s to the left. after the collision the heavier cart is travelling 0.823 m/s to the right. what is the velocity of the lighter cart after the collision? your answer must be in kgm/s. do not include units in your answer but do include or -.
A) -0.581
B) -0.398
C) 0.173
D) 0.299