Question

A stone is dropped from the top of a cliff. It hits the ground below after 3.90 s . How high is the cliff?

Answer 1

Use Equations of Kinematics

u = initial velocity = 0

S = distance travelled in meters

t = time in seconds

g = acceleration due to gravity = -9.81 m/s²

S = ut + (1/2)gt²

Solve for S