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Two paricles of equal mass m go round a ...

Two paricles of equal mass `m` go round a circle of radius R under the action of their mutual gravitional attraction. The speed of each particle is

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For motion of particle `(mv^(2))/(r)=(Gmm)/((2r)^(2))`
`impliesv^(2)=(Gm)/(4r)impliesv=(1)/(2)sqrt((Gm)/(r))`
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