Two particles of equal mass $'m'$ go around a circle of radius $R$ under the action of their mutual gravitational attraction. The speed of each particle with respect to their centre of mass is
Two particles of equal mass $'m'$ go around a circle of radius $R$ under the action of their mutual gravitational attraction. The speed of each particle with respect to their centre of mass is
- A
$\sqrt {\frac{{Gm}}{R}} $
- B
$\sqrt {\frac{{Gm}}{{4R}}} $
- C
$\sqrt {\frac{{Gm}}{{3R}}} $
- D
$\sqrt {\frac{{Gm}}{{2R}}} $
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