Free Fall

Free fall: gravity alone. Every object falls with $g = 9.8\ \mathrm{m/s^2}$ downward, whatever its mass.

Dropped from rest, after a time $t$:

$$v = g t, \quad h = \tfrac12 g t^2$$

The speed grows each second, so the stone falls farther each second. With up as positive, the velocity is negative.

Each second the ball falls farther, and its velocity grows by $9.8\ \mathrm{m/s}$.