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15 March, 11:36

An object falls from a high building and hits the ground in 8.0 seconds. Ignoring air resistance, what is the distance that it fell?

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  1. 15 March, 11:47
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    310 meters

    Explanation:

    Given:

    v₀ = 0 m/s

    t = 8.0 s

    a = - 9.8 m/s²

    Find: Δy

    Δy = v₀ t + ½ at²

    Δy = (0 m/s) (8.0 s) + ½ (-9.8 m/s²) (8.0 s) ²

    Δy = - 313.6

    Rounded to two significant figures, the object fell 310 meters.
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