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Car - work

  1. Mar 18, 2006 #1
    We now that a car is starting to move because of the static friction. We now also that the work of static friction is zero.My question is: the work of what force is responsible for the cars kinetic energy;
     
  2. jcsd
  3. Mar 18, 2006 #2
    Why is the work done by static friction zero in this case?

    The car feels static friction but the wheels are rotating, so as it feels this force it travels a distance. Surely, this suggests that static friction can do work in rotational kinematics.

    Your thoughts?

    Sam
     
  4. Mar 18, 2006 #3

    krab

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    Hint: What do you pay for to run the car?
     
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