Figure shows `4` identical masses of mass `m`, arranged on a cube as shown.
The potential energy of the system is

Options

A. it will collide with one of the masses
B. It execute an oscillatory motion (not SHM)
C. It executes SHM
D. none of these

Explanation

`PE=6xx(GM^(2))/(sqrt(2)a)`
`=-3sqrt(2)(GM^(2))/(a)`
`F=3xx(GM^(2))/(2a^(2))xx(sqrt(2))/(sqrt(3))=sqrt((3)/(2))(GM^(2))/(a^(2))`