I must find the depth of the well. (Waves)

[afcwestwarrior]

Homework Statement

A stone is dropped into a well. The splash is heard 3 seconds later. What is the depth of the well?

Homework Equations

the change in t= change in length/ velocity of sound

The Attempt at a Solution

V= 343 m/s which is the speed of sound

Ok I solved for depth. I made L=d. Then my equation looked like this. D= t * v

D= (3s) * 343 m/s = 1029 meters

The answer is 41 meters if you round off. I've seen solutions to this problem, but I need a walkthrough as to how to do it because I don't understand how the experts on cramster solved this problem.

 

[Redbelly98]

You need to also consider how long it takes the falling stone to reach the water.

Hint: the stone does not travel 343 m/s.

 

[afcwestwarrior]

Ok so the time it takes the stone to fall is T. Shouldn't the time be close to that of the splash. So how do I find out the stone's Velocity.

 

[Redbelly98]

Use the formulas for constant acceleration. For an object released from rest, the initial velocity is zero:
https://www.physicsforums.com/library.php?do=view_item&itemid=204