AP Physics B: Centripetal Force and Gravity

stonecoldgen

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

ehild

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



ehild