# AQA A A2 PHYSICS- CIRCULAR MOTION

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- Created by: Lilli
- Created on: 15-12-15 16:35

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**CIRCULAR MOTION**

Radian- the angle subtended at the centre of the circle by an arc of the circle, whose length is equal to the radius of the circle.

Angular displacement- the angle moved through relative to a specific axis.

Angular velocity-the rate of change of angular displacement with time.

**Centripetal Acceleration**

Objects moving in a circle have changing velocity, which is always along the tangent of the circle. Any moving object at constant acceleration has a centripetal force acting on it.

Examples of **centripetal forces**:

- Jupiter obiting the sun has a centripetal force of
**gravitational**…

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