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## Homework Statement

A boy throws a ball upward at 2.om/s out a window 2.5m above the sidewalk. The ball accelerates at 9.81m/s^2. How fast is it moving when it hits the sidewalk?

## Homework Equations

i tried to use the equation: d= initial velocityxtime + .5(acceleration) (Time^2)

## The Attempt at a Solution

2.5= 0 + .5(9.81)t^2

2.5=4.9m/s^2 x t^2

2.5/4.9= t^2

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