- #1

rabsta00

- 3

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- Homework Statement
- Hikers came across a deep narrow well and decided to find its depth. They dropped a pebble into the well and heard the sound of the pebble hitting the bottom of the well in 7s. Using this information they found the depth of the well. How deep is the well? Assume that the velocity of sound is 340m/s.

- Relevant Equations
- v=v0-gt

y=y0+v0t-0.5gt^2

t=7s

v=340m/s

v=v0-gt

340=v0-9.8x7

v0=408.6

d=d0+v0t-0.5gt^2

d=0+408.6x7-0.5x0.8x7^2

d=2620.1m

this is what I've done but apparently is incorrect, not sure why or what the proper method is

v=340m/s

v=v0-gt

340=v0-9.8x7

v0=408.6

d=d0+v0t-0.5gt^2

d=0+408.6x7-0.5x0.8x7^2

d=2620.1m

this is what I've done but apparently is incorrect, not sure why or what the proper method is