Four point masses are placed at the corners of a square of side 2 m as shown in the figure. Find the centre of mass of the system w.r.t. the centre of square.

Four point masses 1 kg, 1 kg, 2 kg and 2 kg are placed at the corners of a square of side a m as shown in Fig. Find the centre of mass of the system.

Four point charges are placed at the corners of a square ABCD of side 10 cm, as shown in figure. The force on a charge of 1muC placed at the centre of square is

Four point charges are placed at the corners of a square ABCD of side 10 cm, as shown in figure. The force on a charge of 1muC placed at the centre of square is

Four particles of masses m, m, 2m and 2m are placed at the four corners of square of side a. Find the centre of mass of the system.

Four point charges are placed at the corners of a square of side l. Calculate potential at the centre of square.

Four point charges are placed at the corners of a square of side l. Calculate potential at the centre of square.

Four particles of masses m, m, 2m and 2m are placed at the corners of a square of side a, as shown in fig. Locate the centre of mass.

Four particles P,Q,R,S of masses 1kg, 2kg, 3kg and 4kg are placed at the corners of a square of side 1m as shown below. The co-ordinates of the centre of mass of the system are