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Node voltage analysis

  1. Jun 6, 2010 #1

    bon

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    1. The problem statement, all variables and given/known data

    A satellite is in circular orbit of radius R about a star of mass M . The star
    suddenly undergoes an explosion in which one percent of its mass is blown spherically
    symmetrically to a large distance. What are the new nearest and furthest distances of
    the satellite’s orbit around the star?

    2. Relevant equations



    3. The attempt at a solution

    Am i right in thinking that both the angular momentum and energy of the star decrease..the new J = 0.99mrv and the new KE = 1/2 (0.99m)v^2? Same PE?
     
  2. jcsd
  3. Jun 6, 2010 #2

    ehild

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    Re: orbits

    Why should either the KE or the angular momentum of the satellite change? Did any force do any work on it? Or the force field ceased to be central?

    ehild
     
  4. Jun 6, 2010 #3

    bon

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    Re: orbits

    it's mass changed! - i.e. the total PE and KE of remaining satellite + parts blown away is unchanged, yes..but surely the KE of the remaining bit of satellite decreases as its mass is less...?

    Otherwise there would be no max/min distances that it asks us to calculate..
     
  5. Jun 6, 2010 #4

    ehild

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    Re: orbits

    Read the text more carefully.

    "The star suddenly undergoes an explosion in which one percent of its mass is blown spherically symmetrically to a large distance."

    ehild
     
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