Three equal masses (each m) are placed at the corners of an equilateral triangle of side `a`. Then the escape velocity of an object from the circumcentre P of triangle is

Four equal masses (each of mass M) are placed at the corners of a square of side a. The escape velocity of a body from the centre O of the square is

Four equal masses (each of mass M) are placed at the corners of a square of side a. The escape velocity of a body from the centre O of the square is

Three equal masses each of 1 kg are placed at vertices of an equilateral triangle of side 10m. Find the position of centre of mass.

Three charges each 20muC are placed at the corners of an equilateral triangle of side 0.4m The potential energy of the system is

Four equal masses (each of mass M) are placed at the corners of a squares side a the escape velocity of a body from the centre O of the square is

Three particles each of mass m are placed at the three corners of an equilateral triangle of side a. The work done on the system to increase the sides of the triangle to 2a is:

Three identical masses, each of mass 1kg, are placed at the corners of an equilateral triangle of side l . Then the moment of inertia of this system about an axis along one side of the triangle is