Physics

Problem

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: a.

\sqrt{\frac{GM}{R}}

\sqrt{2\sqrt{2} \frac{GM}{R}}

\sqrt{\frac{GM}{R}(1+2\sqrt{2})}

\frac{1}{2}\sqrt{\frac{GM}{R}(1+2\sqrt{2})}