Stability (Oxford AQA IGCSE Physics)
Revision Note
Written by: Leander Oates
Reviewed by: Caroline Carroll
Stability
The centre of mass of a symmetrical object is along the axis of symmetry
The position of the centre of mass affects the stability of an object
An object is stable when its centre of mass lies above its base
Centre of mass of an object in different positions
If the centre of mass does not lie above its base, then an object will topple over
The most stable objects have a low centre of mass and a wide base
Low centre of mass of car
Taller objects with a narrow base have a higher centre of mass and are less stable
This is why lorries and buses are advised not to use motorways and bridges on very windy days
Stability of object in different positions
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