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AP Physics B: Centripetal Force and Gravity 
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#1
Sep2611, 08:41 PM

P: 103

1. The problem statement, all variables and given/known data
Two stars of mass m_{1} and m_{2} are in orbit around their center of mass. If 2m_{1}=5m_{2}, 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/r^{2} 3. The attempt at a solution I don't even know what to put as mass of the centripod, i kneed serious help 


#2
Sep2711, 06:18 AM

HW Helper
Thanks
P: 10,663

What have you learnt about twobody problems? Reduced mass? Kepler's Laws?
ehild 


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