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A Newton's 3rd Law of Motion

  1. Apr 23, 2016 #1

    averycasille

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    Gold Member

    1) " The total momentum of a system of interacting bodies remains constant, providing no external force acts. "

    Why is this untrue?
     
  2. jcsd
  3. Apr 23, 2016 #2
    Because the frame of reference is not inertial.
     
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