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18 October, 13:19

A helicopter hovers 200.0 meters over the ground and releases a relief packet. How much time does it take for the food packet to reach the ground?

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Answers (2)
  1. 18 October, 15:00
    0
    Kinematics equation for a free fall of height h

    h=0*t + (1/2) gt^2

    where g=9.80655 m/s^2 is acceleration due to gravity

    Express equation in terms of t

    t=sqrt (2h/g)

    =sqrt (2*200/9.80655)

    =20/sqrt (9.80655)

    =6.3866 seconds

    =6.387 seconds (to four significant figures)
  2. 18 October, 15:06
    0
    On Plato the answer is 6.4
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