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forcefrom
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Homework Statement
A certain binary star system consists of two stars of masses m and 3m respectively separated by a distance of 1.5 * 10^12 m measured between their centres. These stars revolve in sync with each other around their common centre of mass. If the smaller star has a mass of 1.0 * 10^30 kg, what is their common period of revolution?
r = 1.5 * 10^12 m
m1 = 1.0*10^30 kg
m2 = 3.0*10^30 kg
Homework Equations
Fg = Gmm/r^2
Fc = 4mpi^2r/T^2
The Attempt at a Solution
Initially, I thought I could do Fc = Fg and solve for period, but I'm not sure if that's the right way to do it and it doesn't sound right either.