1. The problem statement, all variables and given/known data A ball whose momentum is p strikes a wall and bounces off, The change in the balls momentum is: A- 0 B- P C- 2p D- p/2 E-Infinity 2. Relevant equations 3. The attempt at a solution It's simple question but I want to make sure if my answer is true. The change in momentum = 0 According the momentum conservation principle. Right ?