A helicopter is ascending vertically with a speed of 1.00 m/s. At a height of 70 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: v0 for the package equals
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trjohnst
ANSWERS: 1
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the down direction is (+) *d=70m *a=9.81 m/s/s *Vo= -1 m/s ______________________________ >> d = Vo*t + (1/2)*a*(t)^2 << ****************************** 70 = -t + 0.5*9.81*(t^2) 0= 4.905*t^2 - t - 70 FACTOR FOR TIME (t): t = 3.31066292 OR t = -4.31066292 (negetive time makes no sense in this question, so we ignor it) ergo; the answer is t = 3.31066292 seconds
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