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20 September, 12:01

After a package is dropped from the plane, how long will it take for it to reach sea level from the time it is dropped? assume that the package, like the plane, has an initial velocity of 342 km/hour in the horizontal direction. express your answer numerically in seconds. neglect air resistance.

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  1. 20 September, 15:20
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    Time taken by the package to reach the sea level = 13.7 s

    height=h=925 m

    initial velocity along vertical = vi=0

    acceleration due to gravity=g=9.8 m/s^2

    using the kinematic equation h = Vi*t + 1/2 gt^2

    925=0 (t) + 1/2 (9.8) t^2

    4.9 t^2=925

    t = 13.7 s
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