Outline the experiment to find an irregular shape's centre of mass:
1. Suspend the shape from a pin held in a clamp. Freely suspended so that it can turn.
2. When the object comes to rest, providing there is no external forced interrupting, hang a plumbline from the same pin.
3. Mark the position of the plumbline against the shape.
4. Hang the irregular shape from another point and repeat the process.
5. The point where the lines intersect are the shape's centre of mass.
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When an object is suspended it will come to rest with its centre of mass directly below the point of suspension.
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