A baseball catcher is catching a fastball that is thrown at 43 m/s by the pitcher. If the mass of the ball is 0.15 kg and if the catcher moves his mitt backward toward his body by 8.0 cm as the ball lands in the glove, what is the magnitude of the average force acting on the catcher's mitt? Estimate the time interval required for the catcher to move his hands. deltap = mv 43m/s * 0.15kg = 6.45 kgm/s = deltap = Fav * delta t I'm stuck here and I don't know where to go. I'm assuming acceleration is involved but I don't know how to apply it to the problem. Appreciate it if anybody could help, thanks.