Three masses, each equal to M, are placed at the three corners of a square of side a. the force of attraction on unit mass at the fourth corner will be

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.

Three charges, each equal to q, are placed at the three. corners of a square of side a . Find the electric field at. the fourth corner.

Three charges, each equal to q, are placed at the three. corners of a square of side a . Find the electric field at. the fourth corner.

Three charges, each equal to q, are placed at the three. corners of a square of side a . Find the electric field at. the fourth corner.

Three charges, each equal to q, are placed at the three. corners of a square of side a . Find the electric field at. the fourth corner.