# OCR A Level: Mechanics 2 - Centre Of Mass [June 2006 Q5]

**Classical Mechanics**Level pending

\((\text{i})\) Taking \(x\)- and \(y\)-axes along \(AE\) and \(AB\) respectively, find the coordinates of the centre of mass of the lamina.

\((\text{ii})\) The lamina is freely suspended from \(B\). Calculate the acute angle that \(BD\) makes with the vertical.

**Input the angle in degrees, to three significant figures, as your answer.**