Circular Motion

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  • Circular motion
    • Angular displacement     (in radians) = length of arc / radius
      • If an object moves all the way round the circle:  Angular displacement = circumference / radius =
    • One radian is the angle subtended at the centre of the circle by an arc of length equal to the radius of the circle.
    • The object's velocity is at a tangent to the circle
    • Speed = Distance / Time =
    • Acceleration of the object acts towards the centre of the circle
    • The resultant force acts towards the centre of the circle. This is Centripetal Force.


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