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12 April, 07:55

Calculate the height of an object that hit the ground in 9 seconds in free fall (Vi=0) (customary units).

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  1. 12 April, 09:02
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    D = (Vi) t - 4.9t²

    where t = 9 and Vi = 0

    d = 0 - 4.9 (9) ²

    d = - 396.9 m

    "d" is displacement, So the negative just represents that the object reduced it's height. df - di = 0 - 396.9

    di = 396.9 m
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