1. A 20 kg cart is sliding along a level, frictionless table at 4 m/s. A small box moving in the same
direction as the cart falls into the cart. What is the total momentum of the cart and box system?
A. 80 kg.m/s plus the momentum from the small box
B. 80 kg.m/s total
C. 80 kg.m/s minus the momentum from the small box