Originally Posted by

**novadragon849** Hi, I need some help on this question.

A unifom lamina ABCEF is obtained from a rectangle ABCD with AB = CD = 8cm and BC = AD = 6cm, by removing the triangle EDF, where E and F lie on CD, AD respectively, with CE = 2cm and AF = 3cm.

1. Find the distance of the centre of mass of the lamina ABCEF from AB and AD.

2. The lamina is suspended freely from F and hangs in equilibrium under gravity. Find the angle which AF makes with the vertical.

I'm stuck and don't know how to start.