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3 September, 16:21

A jet plane is cruising at 310 m/s when suddenly the pilot turns the engines up to full throttle. after traveling 4.0 km, the jet is moving with a speed of 400 m/s.

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  1. 3 September, 16:40
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    For this problem, we would be using the formula: Vf^2 = Vi^2 + 2ad

    where:

    Vf = 400m/s

    Vi = 300m/s

    a = ?

    d = 4.0km

    = 4000m

    400^2 = 300^2 + 2a4000

    a = [ 160000 - 90000 ] / 8000

    a = 8.75m/s^2

    rounding it off to 2 significant figures, will give us 8.8 m/s^2.
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