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AQA A-level PhysicsCircular MotionLesson 8 of 9

At the bottom of the wheel, the weight acts downwards and the support force acts upwards. The centripetal force is given by

S - mg

where S is the support force and mg is the weight.

Diagram

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Key terms in this lesson

Centripetal force
The resultant force, directed towards the centre of a circle, needed to keep an object moving in that circular path.

More in Circular Motion

All 9 lessons in Circular Motion · All AQA A-level Physics topics