Asked by kent

a person in a hot air balloon ascending vertically at a constant rate of 12mm/s drops a rock over the side when the balloon is 40m above the ground how long will it take the rock to reach the ground

Answers

Answered by Anonymous
12 mm/s = .012 m/s = Vi initial speed up

h = Hi + Vi t - 4.9 t^2

0 = 40 + .012 t - 4.9 t^2

Solve quadratic for t

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