Posted by **Jen** on Saturday, October 23, 2010 at 10:39pm.

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?

- Physics -
**MathMate**, Saturday, October 23, 2010 at 10:50pm
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.

- Physics -
**Jen**, Saturday, October 23, 2010 at 11:43pm
Thank you so much!

- Physics :) -
**MathMate**, Sunday, October 24, 2010 at 12:40pm
You're welcome!

- Physics -
**Sasha**, Saturday, November 27, 2010 at 2:17pm
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.

## Answer this Question

## Related Questions

- Physics - A stone is dropped from the top of a cliff. It hits the ground below ...
- physics - A stone is dropped from the top of a cliff. It hits the ground below ...
- Calculus/Physics - A stone is thrown from a cliff top with an upward velocity of...
- Physics - A stone is dropped from the top of a cliff. The splash it makes when ...
- Physics ?#2 - A ball is dropped from the top of a 53.0m high cliff. At the same ...
- physics - a physics book is thrown horizontal at a velocity of 10.0m/s from the ...
- physics - A stone falls from a cliff. It lands on the ground below the cliff ...
- Physics - Two stones are dropped from the edge of a 60-m cliff, the seconds ...
- Physics - A ball is dropped from the top of a 49.0 -high cliff. At the same time...
- Math - A stone was dropped off a cliff and hit the ground with a speed of 112 ft...