On a straight (4-Seam) fastball, Major League pitchers throw upwards of 90-100 mph, which is very hard; it requires constant throwing, weight training, and practicing command over the pitch. One of the most deadly assets a pitcher can have is a high velocity on his fastball, which helps him blow balls by the batter. In baseball, velocity represents the speed of a given pitch at any point from its release to the time it crosses home plate. In this picture, Reds pitcher Aroldis Chapman who broke the world record, for fastest thrown baseball (108 mph) is winding up to throw.
In the picture there are three things that are important: Final Velocity, Initial Velocity, and Acceleration (time). The formula Vf= Vi+At means that Final Velocity equals Initial Velocity plus acceleration multiplied by time. Final velocity is a product of initial velocity plus the acceleration applied over a period. The longer you apply an acceleration to the ball, the greater the final velocity. Velocity correlates to stride length and the amount of time the hand is in contact with the ball. The longer the stride and the faster the pitcher whips his arm forward the faster the final velocity is.
There is another factor and it is acceleration, the formula is a= -9.80 m/s^2 and it is affected by gravity hence, acceleration due to gravity. This is how quickly vertical velocity changes and in baseball deals with how quickly the vertical velocity changes in meters per second over 60 ft. When the pitch is thrown initial velocity begins and then acceleration happens, and if air resistance is negligible, the horizontal velocity stays constant, and ultimately the catcher’s mitt stops the ball.
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