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Homework Help: Energy of a car going up a hill

  1. Oct 30, 2014 #1
    • Not using homework template due to originally being posted in a different forum.
    find the energy of a required to accelerate a 1800kg car from 15 km/h to 75km/h an up hill road with a vertical rise of 55m

    KE=1/2m(V22-V12)

    KE=1/2(1800)(20.832-4.162)

    KE=1/2(1800)(433.88-17.30)

    KE=1/2(1800)(416.58)

    KE=1/2(749844)

    KE=374922 J

    I'm wondering if I'am on the right track, no sure how to bring the rise in to the problem.
     
  2. jcsd
  3. Oct 30, 2014 #2
    + mgh
     
  4. Oct 30, 2014 #3
    KE=1/2m(V22-V12)+mgh ?
     
  5. Oct 30, 2014 #4
    Energy = Kinetic energy + Potential energy

    Potential energy = mgh
     
  6. Oct 30, 2014 #5
    Thank you
     
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