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Two point masses M are kept fixed on the...

Two point masses M are kept fixed on the x-axis at a distance a from the origin, another point mass m is moving in a circular path of radius R (in y - z plane) under the influence of gravitational force of attraction, then speed of m will be (Assume no forces are acting on m other than the gravitational forces by two M)

A

`sqrt((2GMR^(2))/((R^(2)+a^(2))^((3)/(2))))`

B

`sqrt((GMR^(2))/((R^(2)+a^(2))^((3)/(2))))`

C

`sqrt((3GMR^(2))/((R^(2)+a^(2))^((3)/(2))))`

D

`sqrt((5GMR^(2))/((R^(2)+a^(2))^((3)/(2))))`

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The correct Answer is:
A
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