1. The problem statement, all variables and given/known data a tennis ball of mass m = 0.075kg is thrown at a wall with a speed of v = 15m/s. It strikes the wall at a 45˚ angle and rebounds with the same speed at 45˚. What is the impulse given by the wall? 2. Relevant equations impulse = Change in mass x Change in velocity 3. The attempt at a solution Since the velocity is not changing once the ball rebounds from the wall the impulse is the same as it is when it strikes the wall?