1. May 3, 2008 #1

   jeahomgrajan

   

   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
2. 
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3. May 3, 2008 #2

   Hootenanny

   

   Staff Emeritus

   Science Advisor

   Gold Member

   Let's start from the top. Does the question say uniformally accelerated?

    

   Hootenanny, May 3, 2008
4. May 3, 2008 #3

   jeahomgrajan

   

   NO it doesnt mention that

    

   jeahomgrajan, May 3, 2008
5. May 3, 2008 #4

   tiny-tim

   

   Science Advisor

   Homework Helper

   Hi jeahomgrajan!
   

   In other words:
   
   What is the energy at 14km/h?
   What is it at 25km/h?
   What is the difference?

    

   tiny-tim, May 3, 2008
6. May 5, 2008 #5

   jeahomgrajan

   

   thanks

    

   jeahomgrajan, May 5, 2008

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