# Is the acceleration of a free-falling object uniform?

In a simplified model where outside forces (i.e. forces other than gravity) are ignored, the acceleration of a free-falling object is considered to be uniform, or constant. This acceleration is equal to $g$, the gravitational or free fall acceleration constant of $9.8 {\text{m"//"s}}^{2}$.
Note that because the object is falling downward, $a = - g = - 9.8 {\text{m"//"s}}^{2}$, but g itself is a positive quantity.