Four particles , each of mass M and equidistant from each other, move along a circle of radius R under the action of their mutual gravitational attraction. The speed of each particle is:

Four particles , each of mass M and equidistant from each other, move

1.	Four particles , each of mass M and equidistant from each other, move along a circle of radius R under the action of their mutual gravitational attraction. The speed of each particle is:
Answer» `SQRT((GM)/R)` `sqrt(2sqrt(2)(GM)/R)` `sqrt((GM)/R(1+2sqrt(2)))` `1/2sqrt((GM)/R(1+2sqrt2))` ANSWER :D