Let's practice some conversions. A speed of miles
per hour equals a speed of feet per second, and a
speed feet per second equals a speed of miles
per hour. Recall that there are 5280 feet in a mile, and 3600 seconds
in an hour.
Recall that velocity is the derivative of distance, and acceleration
is the derivative of velocity. Suppose that acceleration is constant,
and equal to . Suppose at time 0 your velocity is .

Let denote your velocity at time . Then

.
Suppose at time your distance (in whatever direction you are
moving) is D.

Let denote your distance at time . Then

.

Let's translate that into a familiar context. Suppose
feet per second squared, is you height at time ,
is your initial height, and is your initial velocity. Then your
height at time is , your
velocity at time is , and
your acceleration at time(t) is, of course, feet per second squared.