Question

two particles of equal mass m go around a circle of radius R under the action of their mutual gravitational attraction . the speed v of each particle is

1)1/2*(Gm/R)1/2

2)1/2R*(1/Gm)1/2

Answer 1

Two particles of equal mass(m) go around a circle of radius R under the action of their mutual gravitational attraction.Here center of mass is stationary because both particles are having same mass.1/2√(GM/R)