What is centre of mass?
In GCSE physics, the centre of mass is a single point at which the weight force acts on an object.
Weight is a force that acts on an object with mass when placed in a gravitational field. The weight force acts from an object’s centre of mass. This is important to remember when you are drawing force diagrams.
Objects with a low centre of mass are more stable than objects with a high centre of mass. More stable objects are less likely to topple.
If the centre of mass lies outside the base of an object, for example, if an object is tilted, then the object will topple.
You don’t specifically need to know about the centre of mass if you are studying Edexcel, WJEC or OCR Gateway GCSE Physics, but it helps to have a brief understanding of the concept. For AQA GCSE Physics, you may be assessed on the centre of mass in your exams.
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