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11 June, 06:24

What is the velocity of an object that has fallen 76 feet

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  1. 11 June, 06:35
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    Ignoring air resistance ...

    vf^2-vi^2=2gs, where vf is final velocity, vi=initial velocity, g=acceleration due to gravity, and s is the displacement of the object ...

    For an object being dropped, vi=0, so we have only have final velocity.

    v^2=2gs

    v=-√ (2gs), g≈-32ft/s^2, s=-76

    v=-√ (2 (-32) (-76))

    v=-√4864

    v≈ - 69.74 ft/s (to nearest hundredth of a foot per second)

    It's negative because the object is falling, or height is decreasing : P
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