Force vs Time Collision: Find Speed of 66-g Tennis Ball

[bkhofmann]

Homework Statement

The Figure shows an approximate representation of the contact force versus time during the collision of a 66-g tennis ball with a wall. The initial velocity of the ball is 4.375E+1 m/s perpendicular to the wall. What is the speed of the tennis ball after the collision?
(see attached)

Homework Equations

The Attempt at a Solution

Not sure how to start, I know the impulse is the area under the curve, that's all. Thanks

 

[nasu]

And the impulse is also equal to the change in momentum.

 

[bkhofmann]

Ok, having a real brain fart. What do I need to do with the impulse to get the new velocity?

 

[nasu]

impulse=(final momentum)-(initial momentum)
momentum=m*v

 

[bkhofmann]

So just divide the Impulse by the mass?

 

[nasu]

If you just divide, you'll get the difference between the two speeds. Is the problem asking for just this?