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31 October, 02:56

A 12000 kg boat is moving 4.25 m/s. Its engine pushes 9200 N forward, but the current pushes back at 12,500 N. How much times does it take the boat to stop?

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  1. 31 October, 04:45
    0
    15.5 seconds

    Explanation:

    Apply Newton's second law:

    ∑F = ma

    -12500 + 9200 = (12000) a

    a = - 0.275 m/s²

    v = at + v₀

    0 = (-0.275) t + 4.25

    t = 15.5 s

    It takes the boat 15.5 seconds to stop.
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