physics
posted by sam .
A 0.70 kg ball is moving horizontally with a speed of 8.8 m/s when it strikes a vertical wall. The ball rebounds with a speed of 3.7 m/s. What is the magnitude of the change in linear momentum of the ball?
I am not sure how to honestly to figure this one out.

Mass times velcity change.
0.70 kg*[8.8 (3.7] m/s
= 0.70 kg*12.4 m/s
= ____ kg*m/s