# math

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

• math -

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.

• math -

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 .

• math -

Oops. Use g=32.2 f s-2
Thanks Qudditch.

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