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Momentum of a car.

  1. May 4, 2005 #1
    What happens to the momentum of a car in movement when it stops?
  2. jcsd
  3. May 4, 2005 #2
    The car has forces acting on it to slow it down, they all do work on the car, and the energy is transferred through the air resistance and friction.

    Momentum isnt conserved, if thats what your asking.
  4. May 4, 2005 #3
    it should be 0 because the velocity becomes 0 when the car stops. (Momentum is mass in motion)
  5. May 5, 2005 #4


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    In an isolated system, momentum is conserved. The momentum of the car when it brakes to a stop, is transferred to the earth. But the earth's mass is so much larger than the car's that the earth's change in rotation speed is not measurable.
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