1. The problem statement, all variables and given/known data It's for a physics project, in which I'm trying to calculate the velocity applied to a fastball thrown at 95mph, when the bat speed of a hitter is 86.99mph. The weight of the ball is 5oz, the weight of the bat 31oz, and we'll go with contact on the ball at .005s.(This is only the small part, the rest I can do alone) 2. Relevant equations If I have the right ones...... F=ma Fxdelta t = mVf - mVi (mass1 times velocity1 + mass2 times V2)i = (mass1V1 + m2V2)f 3. The attempt at a solution Just not sure where to begin. The only helpful site has been this http://www.kettering.edu/~drussell/bats-new/batw8.html but i don't think i understand the guys explanations. Thanks in advance for the help.