The gravitational potential at the centre of a square of side a when four point masses m each are kept at its vertices will be

The gravitational potential energy of a system of three particles of mass m each kept at the vertices of equilateral triangle of side x will be

Find the electric field and potential at the centre of a square of side d = 10 cm. Four identical charges of q=2muC each are kept at the four corners of a square.

Calculate the gravitational field and gravitational potential at the centroid of a triangle when three equal masses one placed at each of its corners.

Find the gravitational potential energy of a system of four particles, each of mass m placed at the verticles of a square of side l . Also obtain the gravitaitonal potential at centre of the square.

If four different masses m_1, m_2,m_3 and m_4 are placed at the four corners of a square of side a , the resultant gravitational force on a mass m kept at the centre is

There are four solid balls with their centres at the four comers of a square of side a . the mass of each sphere is m and radius is r . Find the moment of inertia of the system about (i) one of the sides of the square (ii) one of the diagonals of the square.

Four masses, each equal to M are placed at the four corners of a square of side a. Calculate the force of attraction on another mass m, kept at the centre of the square.

Find the gravitational potential due to a hemispherical cup of mass M and radius R, at its centre of curvature.

The gravitational potential energy of an isolated system of three particles, each of mass m , at the three corners of an equilateral triangle of side l is