# Answer on Mechanics | Relativity Question for Allie

Question #10679

A prankster drops a water balloon off the top of a 1,024-ft.-high building.When will the balloon hit the ground?

Round your answer to one decimal place.

The balloon hits the ground after___ seconds.

Round your answer to one decimal place.

The balloon hits the ground after___ seconds.

Expert's answer

1024 ft = 312.115 m

h = g · t^2 / 2

t = sqrt(2 · h / g)

t = sqrt(2 ·

312.115 / 9.81) = sqrt(63.632) = 7.977 s

The balloon hits the ground after

7.977 (approx. 8.0) seconds.

h = g · t^2 / 2

t = sqrt(2 · h / g)

t = sqrt(2 ·

312.115 / 9.81) = sqrt(63.632) = 7.977 s

The balloon hits the ground after

7.977 (approx. 8.0) seconds.

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