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Angular Velocity of the earth

  1. Apr 20, 2010 #1
    The problem statement, all variables and given/known data
    4id0mx.jpg


    The attempt at a solution
    I think the answer is (b) because an increase in mass would cause an increase in inertia of Earth. This would decrease the velocity of Earth, and since velocity is proportional to angular velocity, both would decrease. Am I right?
     
  2. jcsd
  3. Apr 21, 2010 #2

    ehild

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    The Earth stays on the same orbit. Think of Kepler's third law about the relation between distance from Sun and orbital period.

    ehild
     
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