Light-rail passenger trains that provide transportation within and between cities speed up and slow down with a nearly constant (and quite m

Question

Light-rail passenger trains that provide transportation within and between cities speed up and slow down with a nearly constant (and quite modest) acceleration. A train travels through a congested part of town at 6.0 m/s m / s . Once free of this area, it speeds up to 14 m/s m / s in 8.0 s s . At the edge of town, the driver again accelerates, with the same acceleration, for another 16 s s to reach a higher cruising speed. What is the final speed? Express your answer to two significant figures and include the appropriate units.

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Vodka 3 years 2021-07-27T22:35:39+00:00 1 Answers 292 views 0

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  1. minhkhoi
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    2021-07-27T22:37:15+00:00
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    Answer:

    30 m/s

    Explanation:

    We can equation of motion to solve this question.

    v = u + at \\ 14 = 6 + a(8.0) \\ a = 1m {s}^{ - 2} \\ \\ v = u + at \\ v = 14 + (1)(16) \\ v = 30m {s}^{ - 1}

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