Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Ferrari energy physics

  1. May 3, 2008 #1

    jeahomgrajan

    User Avatar

    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. jcsd
    Phys.org - latest science and technology news stories on Phys.org
  3. May 3, 2008 #2

    Hootenanny

    User Avatar
    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

    User Avatar

    NO it doesnt mention that
     
    jeahomgrajan, May 3, 2008
  5. May 3, 2008 #4

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    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

    User Avatar

    thanks
     
    jeahomgrajan, May 5, 2008
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook