BRAINCAKEOn the Road
A car going round a roundabout experiences a force towards the centre of the roundabout. This force is provided by friction n the tyres. Limiting friction is proportional to the car's weight: F = μmg where mg is the weight. So μmg must be greater than or equal to mv2/r. So v cannot be greater than √(μgr).
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Key terms in this lesson
- centripetal force
- The resultant force directed towards the centre of a circular path that keeps an object moving along that circle.
- limiting friction
- The maximum frictional force between two surfaces in contact, reached just before sliding begins, equal to the coefficient of friction times the normal force.
More in Further Mechanics
- Angular Speed
- Centripetal Acceleration
- Proof - centripetal acceleration
- Centripetal Force
- The London Eye
- A Spin Dryer
- Momentum as a Vector
- Conservation of Momentum in Two Dimensions
All 15 lessons in Further Mechanics · All Edexcel A-level Physics topics