A stone is dropped from the top of a cliff. It is seen to hit 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 metres
t = time in seconds
g = acceleration due to gravity = -9.81 m/s²

S = ut + (1/2)gt²
Solve for S.

Answer 2

Thank you so much!

Answer 3

You're welcome!

Answer 4

A stone is dropped from the top of a cliff. The splash it makes when striking the water below is heard 4.5 s later.