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## Homework Statement

A stone dropped from the top of a building hits the ground in 2.9 s. How high is the building?

a=9.8 m/s^2

yinitial=0

vinital=0

y=?

## Homework Equations

y=1/2at^2

## The Attempt at a Solution

y=1/2at^2

Plugging in what I know:

y=1/2(9.8m/s^2)(2.9s)^2

Simplifying:y=1/2(82.4) m

Answer: y=41.2 m

Is this correct? Thanks in advance for confirming! :-)