posted by wtfrd on .
A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 5.2 seconds later. If the speed of sound is 340 m/s, how high is the cliff?
distance = rate * time
height = 5.2 * 340 = 1768m
It should be as simple as that.
Michael, the time given is not the time for the sound traveling. See my post
The time given is the time of falling and the time of thesound going up.
time sound= h*340
h= 1/2 g timefalling or
time falling= 2h/g=5.2-h*340 solve for h
Bob - is "g" in your equation gravity?
Oh, sorry. I didn't mean to give wrong information.
g is the acceleration due to gravity, yes.