(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A man drops a stone into a water well on his farm. He hears the sound of the splash 3.18 s later.

How deep is the well? The acceleration due to gravity is 9.8 m/s^2 and the speed of sound in air is 316 m/s.

Answer in units of m.

2. Relevant equations

x - x_{0}= v_{0}t + (1/2)at^{2}

3. The attempt at a solution

x - x_{0}= 316 m/s + (1/2)(-9.8 m/s^2)(3.18 s)^{2}

x - x_{0}= 955.32924 m

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I think I'm doing this correctly...but it's coming out as wrong. I think it's because I'm assuming the speed of sound given (316 m/s) is the initial velocity; but isn't that correct?

Any help would be appreciated.

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# Finding the height of a well after a stone is dropped

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