1. The problem statement, all variables and given/known data 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? 2. Relevant equations deltaP = Pf - Pi P = mv 3. 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 7.59= 0.145vf 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?