1. Apr 23, 2016 #1

   averycasille

   

   Gold Member

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

    

   averycasille, Apr 23, 2016
2. 
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3. Apr 23, 2016 #2

   DrStupid

   

   Because the frame of reference is not inertial.

    

   DrStupid, Apr 23, 2016

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