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spndsh

  • 3 years ago

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

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  1. imron07
    • 3 years ago
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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.

  2. imron07
    • 3 years ago
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    I mean r :)

  3. spndsh
    • 3 years ago
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    So m doesn't matter in this problem, right?

  4. imron07
    • 3 years ago
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    Since it's equal, it cancels each other.

  5. spndsh
    • 3 years ago
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    ok, cool

  6. imron07
    • 3 years ago
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    Good luck :)

  7. spndsh
    • 3 years ago
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    wouldn't vf =0?

  8. imron07
    • 3 years ago
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    What does vf stands for? final velocity?

  9. spndsh
    • 3 years ago
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    yea

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

  11. spndsh
    • 3 years ago
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    oh, gotcha

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