How much is the acceleration of a baseball thrown by a pitcher in a major league baseball game, if the ball goes from 0 to 90 mph in a one-half-second time period?

Answer 1

V=90mi/h * 1600m/mi * 1h/3600s.= 40 m/s.

a = (V-Vo)/t = (40-0)/0.5 = 80 m/s^2.

Answer 2

80