A stone falls 36.0m (120ft).

How long did it take the stone to hit the ground? How fast was the stone moving on impact ft/sec? m/sec?

Assume the stone was falling on Earth and started at rest.

Initial velocity (v) = 0 m/s

Final velocity (V) = ?

Acceleration (g) = 9.81 m/s^2

Distance (d) = 36 m

Time (t) = ?

For the first part:

d = v*t+0.5*a*t^2 = 0.5*a*t^2 = 4.9*t^2 = 36

Solve for t: t = 2.7 sec

For the second part:

V^2 = v^2+2*a*d = 2*a*d = 2*9.81*36 = 706.32

Square root for V: V = 26.6 m/s