anonymous
  • anonymous
Under which of these conditions can you conclude with certainty that the total momentum before a collision is the same as after the collision? A. Gravity is the only force acting on the system. B. The forces that each object in a system exerts on the other in any pair of objects are equal in size and opposite in direction. C. There are external net forces but the objects in the system exert no forces on each other. D. The system of objects has no forces from outside the system acting on it.
Physics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
what do you think?
Michele_Laino
  • Michele_Laino
we can demonstrate that it is the option B, for a system composed by N particles interacting each other. Nevertheless the computation is long
anonymous
  • anonymous
ohh okay!! so our solution is choice B?

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Michele_Laino
  • Michele_Laino
that's right!
anonymous
  • anonymous
yay!! thank you:)
Michele_Laino
  • Michele_Laino
please wait a moment
anonymous
  • anonymous
okay!
Michele_Laino
  • Michele_Laino
on our system no external force has to act, namely there aren't external forces, which are acting on our system
Michele_Laino
  • Michele_Laino
so I think it is option D
anonymous
  • anonymous
ohh so it would not be choice B?
anonymous
  • anonymous
ahh okay!! :)
Michele_Laino
  • Michele_Laino
ok!! :)

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