- #1
PhysGoat
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Homework Statement
A person throws a rock off a cliff and hears the splash below 3.4 seconds later. If we know the speed of sound is equal to 340m/s how high is the cliff to the nearest metre?
Homework Equations
I've been trying to use, r = ut + 1/2at2 and
v2 = u2 +2ar and
v= u + at
The Attempt at a Solution
I know that the height of the cliff should be around 56 m as:
r = 0 + 4.9(3.4)2
But i don't know how to factor in the time delay of the sound :(
The answer is: (Spoiler)
52 m
Thanks