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spndsh Group Title

Two Juptier sized planets are released from rest 1.0 x 10^11 m apart. What are their speeds as they crash into each?

  • one year ago
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  1. imron07 Group Title
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    The mechanical energy is conserved. 1/2 mv^2+Gm/r=constant From here we can find v and x as well.

    • one year ago
  2. imron07 Group Title
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    I mean r :)

    • one year ago
  3. spndsh Group Title
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    So m doesn't matter in this problem, right?

    • one year ago
  4. imron07 Group Title
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    Since it's equal, it cancels each other.

    • one year ago
  5. spndsh Group Title
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    ok, cool

    • one year ago
  6. imron07 Group Title
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    Good luck :)

    • one year ago
  7. spndsh Group Title
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    wouldn't vf =0?

    • one year ago
  8. imron07 Group Title
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    What does vf stands for? final velocity?

    • one year ago
  9. spndsh Group Title
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    yea

    • one year ago
  10. imron07 Group Title
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    Lol, you're quite right. But the problem ask for v just the moment before collision. It isn't 0.

    • one year ago
  11. spndsh Group Title
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    oh, gotcha

    • one year ago
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