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March 26, 2017

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A certain car is capable of accelerating at a rate of + 0.30 m/s2. How long does it take for this car to go from a speed of 55 mi/h to a speed of 80 mi/h?

  • physics - ,

    Vf - Vo = 80 - 55 = 25mi/h.

    25mi/h * 1600m/mi * (1/3600h/s =11.11m/s.

    a = (Vf - Vo) / t = 0.30m/s^2,
    (11.11) / t = 0.30,
    0.3t = 11.11,
    t = 37s.

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