What is the acceleration of a fastball?A baseball pitcher throws a fast ball. The ball goes from rest to a speed of 50m/s in his hand. His throwing action covers a distance of two meters. Find the acceleration of the ball, assuming it is constant.
We have a=(v2-v02)/2(x-x0) = 625m/s2 ~ 70 gravities!
We can make a dimensional analysis of the terms in (5) to check that they are consistent: