# Physics A2 Level

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 Author: koolcookie11 ID: 107460 Filename: Physics A2 Level Updated: 2011-12-15 05:20:48 Tags: physics alevel circular motion Folders: Description: Motion in a Circle Show Answers:

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1. Uniform Circular Motion
• an object rotating at a steady rate
• motion of an object moving at constant speed along a circular path
2. Angular Displacement
• The angle an object in circular motion turns through
• time period = T
• frequency = f
• 2πt/T
• 2πft
3. Angular Speed
• The angular displacement per second
• Ω (angular displacement) = 2π/T = 2πf = v/r
4. Centripetal Acceleration
• direction of the velocity changes continuously as the object moves in a circular path
• acceleration towards the centre of the circle
5. Centripetal force
• resultant force on an object moving round a circle at constant speed
• acts towards the centre of the circle
• F=mw2r

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