What is the magnitude of the impulse

[alyssaxo]

Homework Statement

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?

Homework Equations

I=Ft
I=ΔP
KE= 1/2 m v^2

The Attempt at a Solution

the answer is 1.3 N s but i don't know how to get there.

 

[Chestermiller]

What was its kinetic energy before hitting the wall? What was its kinetic energy after rebounding?

Chet