- #1

iPhotonHQ

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## Homework Statement

"The fastest measured pitched baseball left the pitcher's hand at the speed of 45 m/s. If the pitcher was in contact with the ball over a distance of 1.50m and produced constant acceleration, (a) what acceleration did he give the ball, and (b) how much time did it take him to pitch it?"

- I am doing this problem as part of my studying and I don't think that the textbook gives an answer to it. I am wondering if I did it correctly... Thanks!

- Assume one-dimensional motion.

## Homework Equations

x is displacement (because my professor likes to use x for that).

x = ((v

_{i}+ v

_{f}) / 2)t

a = (v

_{f}- v

_{i}) / t

## The Attempt at a Solution

v

_{f}= 45 m/s

v

_{0}= 0 m/s

x = 1.5m

x = (45 + 0)/2 *t

x = 22.5t

1.5 / 22.5 = t

t ≈ .067

a = 45m/s / .067s

a ≈ 671.642 m/s

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