Question

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?

Answers

MathMate
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.
Jen
Thank you so much!
MathMate
You're welcome!
Sasha
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.

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