A boy jumps from rest, straight down from the top of a cliff. He falls halfway down to the water below in 0.696 s. How much time passes during his entire trip from the top down to the water? Ignore air resistance.

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## Answers (1)

d = 1/2gt²

distance (d) is proportional to time (t) squared.

d = 1/2 and t = 0.696 when d = 2 x 1/2 then t = 2² x 0.696 = 2.78 s ANS