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Homework Help: Ferrari energy physics

  1. May 3, 2008 #1

    jeahomgrajan

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    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
     
    jeahomgrajan, May 3, 2008
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  3. May 3, 2008 #2

    Hootenanny

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    Let's start from the top. Does the question say uniformally accelerated?
     
    Hootenanny, May 3, 2008
  4. May 3, 2008 #3

    jeahomgrajan

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    NO it doesnt mention that
     
    jeahomgrajan, May 3, 2008
  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:
     
    tiny-tim, May 3, 2008
  6. May 5, 2008 #5

    jeahomgrajan

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    thanks
     
    jeahomgrajan, May 5, 2008
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