Two particles of equal mass m go around a circle of radius R under the action of their mutual gravitation attraction. The speed of each particle with respect to their centre of mass is:
A
√Gm2R
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B
√GmR
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C
√Gm4R
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D
√Gm3R
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Solution
The correct option is C√Gm4R Their mutual attraction force will be equal to the centrifugal force..