Three identical metal balls each of radius `r` are placed touching each other on a horizontal surface such that an equilateral triangle is formed, when the center of three balls are joined. The center of mass of system is located at the

Three identical metal balls, each of the radius r are placed touching each other on a horizontal surface such that an equilateral triangle is formed when centre of three balls are joined. Then where does their centre of mass?

Three thin unifrom circular discs each of mass M and radius R are placed touching each other on a horizontal surface such that an equilateral triangle is formed, when the center of three discs are joined. Find the M.I. about an axis passing through the center of mass system of discs and perpendicular to the plane.

Three identical spheres each of radius R are placed touching each oother on a horizontal table. Where is the centre of mass of the system located?

Three identical balls each of radius 10 cm and mass 1 kg each are placed touching one another on a horizontal surface. Where is their centre of mass located?