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Thermal energy(physics)

  1. Apr 24, 2005 #1
    A 1500 kg car traveling at 20m/s skids to a halt. What is the change in the thermal energy of the car and the road surface?

    Here is how i try to approach it but i get a wrong answer:
    First I solve for All dissipstive forces which is the frictional force in this problem.
    I said the coefficient of the rolling friction is .02. to find the delta x, i used kinematic equations, and I end up with the wrong answer..could someone please tell me where i went wrong?
     
  2. jcsd
  3. Apr 24, 2005 #2

    OlderDan

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    Skidding and rolling friction do not go together, but you don't need any coefficient of friction in this problem. All the cars initial kinetic energy is converted into thermal energy.
     
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