A batter hits a fastball that is travelling at -38 m/s,. The ball has a mass of 0.145 kg. The change in momentum in the ball is 13.1 kg.m/s. what is the balls final momentum?
B.) what is the final velocity of the baseball?
deltaP = Pf - Pi
P = mv
The Attempt at a Solution
p initial = 0.145( -38.0) = -5.51 kg.m/s
so... 13.1 = Pf - (-5.51)
Pf = 13.1 - 5.51
= 7.59 kg.m/s
b.) Pf = mvf
vf = 52.3 m/s
I thought this problem was pretty basic, but i got 0 out of 4 for it, what do you guys get for a solution?