The weight of an object acts on a single point- the centre of mass
- a useful concept for designers and engineers
Suspended equilibrium
If you suspend an object and then realease it, it will eventually come to rest with its centre of mass directly below the point of suspension.
Symmetrical objects
The centre of mass for a symmetrical object lies along the axis of symmetry
Unsymmetrical objects
1) Hang the shape from one of the holes
2) Use a plumb line (weight on the end of string) to draw a vertical line on the shape from the rod
3) Repeat the procedure, hanging the shape from a different hole
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