Find the potential energy of a sytem of four particle each of mass 5 kg placed at the vertices of a square of side 2m.

Find the centre of mass of three particles at the vertices of an equilateral triangle. The masses of the particles are 100g, 150g, and 200g respectively. Each side of the equilateral triangle is 0.5m long.

Find the side of the square whose perimeter is 20m.

Find the areas of the squares whose sides are : ( c ) 5 cm