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18 June, 14:55

A kicked ball rolls across the grass and eventually comes to a stop in 4.0 sec. When the ball was kicked, its initial velocity was 20 mi / hr. What is the acceleration of the ball as it rolls across the grass?

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  1. 18 June, 18:48
    0
    -2.24 m/s²

    Explanation:

    Given:

    v₀ = 20 mi/hr = 8.94 m/s

    v = 0 m/s

    t = 4.0 s

    Find: a

    v = v₀ + at

    0 m/s = 8.94 m/s + a (4.0 s)

    a = - 2.24 m/s²
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