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29 August, 12:15

A jet plane lands with a velocity of + 107 m/s and can accelerate at a maximum rate of - 5.18 m/s2 as it comes to rest. From the instant it touches the runway, what is the minimum time needed before it can come to rest?

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  1. 29 August, 12:42
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    20.7 s

    Explanation:

    The equation to calculate the velocity for a uniform acceleration a, time t and initial velocity v₀:

    v = a*t + v₀

    Solve for t:

    t = (v - v₀) / a
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