Two particles of equal mass 'm' go aroun...

Two particles of equal mass `'m'` go around a circle of radius `R` under the action of their mutual gravitaitonal attraction. The speed of each particle with respect to their centre of a mass is -

A

1/2 `sqrt(frac(Gm)(R)`

B

`sqrt(frac(4Gm)(R)`

C

`frac(1)(2R)sqrt(frac(1)(Gm)`

D

`sqrt(frac(Gm)(R)`

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