h = the height
of the object at any given point
t = time the object is in motion (in seconds)
= the initial height
(in feet or meters) from which the ball was dropped or launched
= the initial velocity
(in ft/sec or m/sec) of the object when it was launched.
< 0, the object was propelled downward
= 0, the ball was dropped from rest with no initial velocity
> 0, the ball was propelled upward.