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Collision problem

  1. Jan 31, 2010 #1
    A 910-{\rm kg} sports car collides into the rear end of a 3000-{\rm kg} SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.8 {\rm m} before stopping. The police officer, estimating the coefficient of kinetic friction between tires and road to be 0.80, calculates the speed of the sports car at impact.
    What was that speed in m/s?
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Feb 1, 2010 #2

    tiny-tim

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    Welcome to PF!

    Hi azzs! Welcome to PF! :wink:

    Use conservation of momentum for the inital speed, and then use one of the standard constant acceleration equations.

    Show us what you get. :smile:
     
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