Free-Falling Objects

What is Galileo's hypothesis regarding free-falling objects?

Law 4   At a given location on Earth, and in the absence of air resistance, all objects fall with the same constant acceleration.

Clearly, the constant acceleration that Galileo referred to is the acceleration due to gravity, $g$, which equals 10 $m/s^{2}$ (Note: for MCAT purposes, make your life easier by rounding 9.80 $m/s^{2}$ to 10 $m/s^{2}$).

How can distance, time and acceleration be related in regards to free fall calculations?

$$y = \frac{1}{2}at^{2}$$ (60.7)