math
posted by Gina .
If a ball is dropped from from 288 ft above the ground, how long does it take to reach ground level?

The distance S for a free falling object from rest over t seconds is:
S=(1/2)gt²
where
g=9.8 m.s^{2}
S=288m
Solve for t.
solve for t. 
Be cautious about units on this problem. The problem gives the distance in feet. Gravitational acceleration in English units is about 32 ft/sec^2 .

Oops. Use g=32.2 f s^{2}
Thanks Qudditch.