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Homework Help: Net force =0 or Net force =GM^2/4R^2....?

  1. Jun 16, 2016 #1
    Two stars of equal mass M move with constant speed V in a circular orbital of radius R about their common center of mass .What is the net force on each star?

    the answer to this question was net force=GM^2/4R^2 .I want to ask that why net force not equal to zero although it is in translational equilibrium?

    Any help in this regard would be appreciated....Thank You in anticipation
  2. jcsd
  3. Jun 16, 2016 #2


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    If something is in a circular orbit, how can the force on it be 0? Newton's first/second laws apply.
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