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Homework Help: Ferrari energy physics

  1. May 3, 2008 #1
    1. The problem statement, all variables and given/known data
    If there is no friction, how much energy is needed to acccelerate a 1500kg ferrrari from 14km/h to 25km/h


    2. Relevant equations

    P=(F)(Vav)

    3. The attempt at a solution
    14km/h+25km/h / 2 = 19.5km/h

    F=(g)(m)
    F=9.8*1500
    14700N
     
  2. jcsd
  3. May 3, 2008 #2

    Hootenanny

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    Let's start from the top. Does the question say uniformally accelerated?
     
  4. May 3, 2008 #3
    NO it doesnt mention that
     
  5. May 3, 2008 #4

    tiny-tim

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    Hi jeahomgrajan! :smile:
    In other words:

    What is the energy at 14km/h?
    What is it at 25km/h?
    What is the difference? :smile:
     
  6. May 5, 2008 #5
    thanks
     
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