1. The problem statement, all variables and given/known data A 50. kg cart is moving across a frictionless floor at 2.0 m/s. A 70. kg boy, riding in the cart, jumps off so that he hits the floor with zero velocity. a. What impulse did the boy give to the cart? b. What was the velocity of the cart after the boy jumped? 2. Relevant equations I= mv-mv(initial) 3. The attempt at a solution (50kg)(2.0m/s)-(120kg)(2.0m/s)=-40 kgm/s I really have no idea how to get the velocity after he jumped out so I'm pretty sure the impulse is incorrect as well. Any help would greatly be appreciated. Thanks.