How can the impulse of a bouncing ball be calculated?

[geo321]

Homework Statement

Ok, I am supposed to find the impulse of a .12 kg ball dropped from a height of 1.25 meters. It bounces back from the floor to a height of .6 meters. Not really sure of all the equations needed, I need a lot of help.

 

[Kurdt]

Impulse is equal to the change in momentum if that helps any.