3 The diagram shows a uniform lamina \(A B C D E F G H I J K L\).
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- Explain why the centre of mass of the lamina is 35 cm from \(A L\).
- Find the distance of the centre of mass from \(A F\).
- The lamina is freely suspended from \(A\).
Find the angle between \(A B\) and the vertical when the lamina is in equilibrium.
- Explain, briefly, how you have used the fact that the lamina is uniform.