Cinderella11 Cinderella11

12-12-2016
Physics

Answered

A student drops a rock from a bridge to the water 12m below. How many seconds does it take the rock to hit the water?

Verified Answer :

mathssydney mathssydney

12-12-2016

r = \(\frac{g t^{2} }{2}\)
r - displacement or height
t - time taken
g = 10 m/s-2
t = square root from 2r/g = \(\sqrt{ \frac{2 x 12}{10} }\) = 1.5 seconds

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