To solve this, we are going to use the distance of a free fallen object:

where

is the distance

is the gravity of the Earth


is the time in seconds
We know from our problem that Pete slid a domino off a bridge and it took 2.3 seconds to hit the Gully below, so

. Lets replace that value in our formula to find

:



feet
How can conclude that the domino fell a distance of 85.1 feet.