# If three equal free masses $M$ are at rest at vertex of equlateral triangle of length $R$ at $t=0$.what is relation between position and time? [closed]

I need a equation describing relationship between position of particle and time.You can assume only gravitational interaction between masses.

Newton’s second law tells us that the acceleration of a body of mass $$m$$ experiencing a force $$\mathbf{F}$$ is given $$\mathbf{a}=\mathbf{F}/m$$.
Given that you are only concerned with the gravitation force, we can calculate it so: $$\mathbf{F}_G = G\frac{Mm}{r^2}\hat{\mathbf{r}}$$