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anonymous

  • one year ago

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.

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  1. anonymous
    • one year ago
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    what do you think?

  2. Michele_Laino
    • one year ago
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    we can demonstrate that it is the option B, for a system composed by N particles interacting each other. Nevertheless the computation is long

  3. anonymous
    • one year ago
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    ohh okay!! so our solution is choice B?

  4. Michele_Laino
    • one year ago
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    that's right!

  5. anonymous
    • one year ago
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    yay!! thank you:)

  6. Michele_Laino
    • one year ago
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    please wait a moment

  7. anonymous
    • one year ago
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    okay!

  8. Michele_Laino
    • one year ago
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    on our system no external force has to act, namely there aren't external forces, which are acting on our system

  9. Michele_Laino
    • one year ago
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    so I think it is option D

  10. anonymous
    • one year ago
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    ohh so it would not be choice B?

  11. anonymous
    • one year ago
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    ahh okay!! :)

  12. Michele_Laino
    • one year ago
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    ok!! :)

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