Physics
posted by Jon .
A baseball has a mass of 0.15 kg. A pitcher throws a 40 m/sec fastball which is caught by the catcher. What is the change in momentum of the ball?

What is M*changeinvelocity?

so .15 x 40? because the initial velociy equals zero?

yes. include units.

The next part of the questions says What is the impulse on the catcherâ€™s mitt?
to find impulse do I use the equation
m(vfvi)
with vf = 0m/s and vi= 40m/s 
yes