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Comet Orbit Astrophyiscs question

  1. Sep 17, 2009 #1
    1. The problem statement, all variables and given/known data
    "Supposing that at perihelion a comet is 1 Au from the sun and its speed at that point is 200km/s( in a frame of referance in which sun is stationary). Find its mean PE and KE to one sig digit. Does it satisfy the virial theorem?


    2. Relevant equations
    K= .5mv^2
    U=-GMm/r
    Virial theorem:


    3. The attempt at a solution

    I know how to calculate U and K, and I know that at perihelion the V is at max, but will the K and U I find be the mean?
     
  2. jcsd
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