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21 February, 03:14

In 1986, the first flight around the globe without a single refueling was completed. The aircraft's average speed was 186 km/h. If the airplane landed at this speed and accelerated at - 1.5 m/s2, how long did it take for the airplane to stop?

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  1. 21 February, 05:20
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    Answer: 34.4 sec

    Explanation: Assuming that the desacceleration was constant, we have a = - 1.5m/s²

    vi = 186 km/h → 51.6 m/s

    vf = 0 (because it stopped)

    Vf = Vi + at

    0 = 51.6 - 1.5t

    1.5t = 51.6

    t = 34.4 s
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