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Homework Help: Finding force to accerate with given speed and time!

  1. Sep 29, 2009 #1
    1. The problem statement, all variables and given/known data
    An automobile of mass 1000 kg is traveling 10 m/s. What force is necessary to accelerate it to 50 m/s in 8 sec?

    2. Relevant equations

    Used Sigma(F) = (m)(a)

    Sigma F = force
    m = mass
    a = acceleration

    3. The attempt at a solution

    F = ma
    Sigma F = (1000)(50-10)
    And that number is way too high. I don't really know how to approach this problem or even what I should use. Please help. Thank You.
  2. jcsd
  3. Sep 29, 2009 #2

    Doc Al

    User Avatar

    Staff: Mentor

    First you need to calculate the acceleration properly. 50-10 m/s is the change in velocity. What's the acceleration?
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