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Homework Help: Acceleration Question

  1. Nov 13, 2008 #1
    Could some one please confirm my answer. Thanks

    1. The problem statement, all variables and given/known data

    A car was moving on the highway at a speed of 90 km/h. The driver then stepped
    on the gas and started to accelerate uniformly at a rate of 0.26 m/s^2, and he was
    able to overtake a truck in 35 s.

    What was the final speed of the car after this
    time?

    2. Relevant equations



    3. The attempt at a solution

    90km = 25 m/s

    0.26m/s^2 x 35sec = 9.1 m/s

    Therefore, the car was originally traveling @ 25m/s and with acceleration it gained 9.1 m/s.


    25 m/s + 9.1 m/s = 34.1 m/s--- converted to 123 km/h
     
  2. jcsd
  3. Nov 14, 2008 #2
    yes its correct. Leave your answer in m/s please. Its the S.I. unit for length and time.
     
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