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Earth's rotational speed when its gravity is 5.0m/s2

  1. Mar 12, 2007 #1
    What will be the rotational speed of the Earth when gravity would be
    only 5.0m/s2
     
  2. jcsd
  3. Mar 12, 2007 #2

    russ_watters

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    Staff: Mentor

    Why would it be different? Since this is a contrived hypothetical, you'll need to explain...Are you assuming its rotational momentum is the same and its inertia is different?
     
  4. Mar 12, 2007 #3
    Odd question. Use of an arbitrary number implies homework. Maybe the OP misparaphrased something like "how much would the earth's spin need increase, in order to halve effective gravity at the equator"?
     
  5. Mar 13, 2007 #4
    Yes, you express my question more precisely. Will you be kind to help me to calculate this speed and show me the way you do it?
    Thanks.
     
  6. Mar 14, 2007 #5
    Yes, you express my question more precisely. Will you be kind to help me to calculate this speed and show me the way you do it?
    Thanks
     
  7. Mar 14, 2007 #6

    russ_watters

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    Staff: Mentor

    Well, do you know the equation for centripetal acceleration and the radius of the earth...?
     
  8. Mar 14, 2007 #7
    use google to help you out.
     
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