Danica McKellar solves a similar problem in the mathematics tutoring section of her site, where she concludes that an 8-foot-tall outfielder who released the ball from a height of 4 feet would have to throw it at an initial speed of 101.9 mph to get it to home plate 180 feet away. Nolan Ryan threw the fastest pitch on record, which was 100.9 mph, so it seems impossible that an outfielder would be able to do this.
If the ball travels from initial height
to maximum height
, we know that its initial vertical speed
is
. With the initial speed, we can calculate the total time that the ball is in flight, that is, the time that it takes to rise from
to
and fall back down to the ground:
. Then, the initial speed of the ball is a simple rate problem (distance = rate times time),
.
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