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February 1, 2015

February 1, 2015

Posted by **Jeff J.** on Friday, September 16, 2011 at 2:25pm.

- Physics -
**bobpursley**, Friday, September 16, 2011 at 4:36pmFigure the time to fall:

410=1/2 g t^2 solve for time

then figure time for sound to come up:

410=vs*time

add the times.

As a practical matter, one can't hear the rock very well, it hits the sides going down, slows, bounces, so the entire process is not very accurate. I dispute that it is "good idea".

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