A boy finds an abandoned mine shaft in the woods, and wants to know how deep the hole is. He drops in a stone, and counts 4 seconds before he hears the "plunk" of the stone hitting the bottom of the shaft. Approximately how deep is the shaft? (Assume a gravitational acceleration of 9.8 m/s2 and no significant air resistance.)

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4 April, 17:46

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Ireland Schaefer · Answer 1

S = (0x4) + (0.5x4.81x4x4)

S=0.78.48

The depth is approximately 78 meters.

(My brain hurts now) : P Good Luck!