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
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.

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