ch13-p055 - 55. In our system, we have m1 = m2 = M (the...

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55. In our system, we have m 1 = m 2 = M (the mass of our Sun, 1.99 × 10 30 kg). With r = 2 r 1 in this system (so r 1 is one-half the Earth-to-Sun distance r ), and v = π r/T for the speed, we have () 2 23 12 1 2 2 . 2 rT Gm m r mT rr G M = ¡ = With r = 1.5 × 10 11 m, we obtain
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