1. The problem statement, all variables and given/known data a ball having a mass of 150 g strikes a wall with a speed of 5.2 m/s and rebounds with only 50% of its initial kinetic energy. what is the magnitude of the impulse on the wall from the ball? 2. Relevant equations I=Ft I=ΔP KE= 1/2 m v^2 3. The attempt at a solution the answer is 1.3 N s but i dont know how to get there.