posted by Jesse .
omar throws a rock down with speed 12 m s from the top of a tower. The rock hits the ground after 2.0 s. What is the height of the tower?
H = 12*t + (g/2)*t^2
Plug in t=2 and solve for the height H, which is the distance it falls in that time.
g = 9.8 m/s^2