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假設兩物體的質量分別為m1,m2,對應的半徑為r1,r2,則有: Gm1*m2/(r1+r2)^2=m1*(w^2)*r1=m2*(w^2)*r2 m1*r1=m2*r2又有v=w*r 所以,當m1减小,m2增大時,r1,v1增大,r2,v2减小 T=2π/w週期不變
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