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)

Options

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))))`

Answer

A