An object falls from a high building and hits the ground in 9.0 seconds. ignoring air resistance, what is the distance that it fell?

We have:

Time (t) = 9.0 seconds

Acceleration (a) = - 9.8 m/s²

Final Velocity (v) = 0 m/s ⇒ It's zero as the object's speed stops when it hits the ground

Using one of the constant acceleration equation

s = vt - ¹/₂at²

s = (0*9) - (0.5 * - 9.8 * 9)

s = 0 + 44.1

s = 44.1 metres