Two particles of equal mass go round a circle of radius $R$ under the action of their mutual gravitational attraction. The speed of each particle is
Two particles of equal mass go round a circle of radius $R$ under the action of their mutual gravitational attraction. The speed of each particle is
- A
$v = \frac{1}{{2R}}\,\sqrt {\frac{1}{{Gm}}} $
- B
$v = \sqrt {\frac{{Gm}}{{2R}}} $
- C
$v = \frac{1}{2}\,\sqrt {\frac{{Gm}}{R}} $
- D
$v = \sqrt {\frac{{4Gm}}{{R}}} $
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