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You drop a rock into a deep well and 4.1s later hear the splash.

How far down is the water? Neglect the travel time of the sound.
Express your answer using two significant figures.
10 years ago

Answers

herp_derp
d = vt + at²/2
d = 0(4.1) + (-9.8)(4.1)²/2
d = -82 m

It is negative because this is the distance from ground level. In this case, the negative only gives its direction. Therefore, the answer is 82 m.
10 years ago

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