Direction, velocity and impulse of a ball.

[nasadall]

Homework Statement

A ball of mass 350g is traveling with a speed of 4m/s when it hits at right angles a fixed vertical wall. The ball rebounds with a speed of 3m/s. Find the magnitude of the impulse exerted by the ball on the wall. Using a simple diagram show the direction of velocities and the impulse.

Hi all i can't seem to finish my coursework, I'm stuck into questions that, i can't solve.

can some one help me please?

 

[tiny-tim]

hi nasadall!

what's good ol' https://www.physicsforums.com/library.php?do=view_item&itemid=26" ?