Question

Pete slid a domino off a bridge and it took 2.3 seconds to hit the Gully below how many feet did the domino fall

Answer 1

To solve this, we are going to use the distance of a free fallen object: $d=0.5gt^2$
where
$d$ is the distance
$g$ is the gravity of the Earth $32.17ft/s^2$
$t$ 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 $t=2.3$. Lets replace that value in our formula to find $d$:
$d=0.5gt^2$
$d=0.5(32.17)(2.3)^2$
$d=85.1$ feet

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