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Homework Help: AP Physics B: Centripetal Force and Gravity

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  1. Sep 26, 2011 #1
    1. The problem statement, all variables and given/known data
    Two stars of mass m1 and m2 are in orbit around their center of mass. If 2m1=5m2, and thier orbital period is 120Ms, calculate the mass of the larger star, given that the distance between their centers is 1400Gm.


    2. Relevant equations
    F=GmM/r2


    3. The attempt at a solution
    I don't even know what to put as mass of the centripod, i kneed serious help
     
  2. jcsd
  3. Sep 27, 2011 #2

    ehild

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    Homework Helper

    What have you learnt about two-body problems? Reduced mass? Kepler's Laws?



    ehild
     
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