|3 | Patrick Copland's Balancing Cube
An outline of this demonstration piece of Patrick Copland has been adopted as the logo for the Natural Philosophy Historical Collection. The demonstration illustrates that the weight of an object acts through its centre of gravity, which may lie outside the object. Supporting the object beneath the centre of gravity will hold it up. In this case the centre of gravity of the cube with weighted handles lies near the end of the metal side strut.
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