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21 January, 15:02

A 2.50-kg stone is dropped from rest at a height of 3.75 m. what impulse does gravity impart to this stone from the instant it is dropped until it hits the ground, assuming negligible air resistance?

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  1. 21 January, 15:05
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    F = MA

    F = 2.5 x 9.8

    F = 24.5 N

    Time needed to fall

    3.5 = 0.5 x 9.5 x t^2

    t = 0.845 s

    Impulse = F x t

    = 24.5 x 0.845

    =20.7025
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