1. The problem statement, all variables and given/known data one of my hw problems you are sitting in a railcart which is moving forward. In your hand is a ball...you throw the ball against the wall of the railcart, and it bounces off of the wall and you catch it...the ball has mass m and was thrown with velocity v...which of the following shows the change in momentum of the rail cart a. 0 b. mv c. 2mv d. none of above 2. Relevant equations mv + mv = mv + mv 3. The attempt at a solution i was thinking the answer is b because if the ball bounces off, it had to have affected the rail cart with a value of mv ???