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13 Cards in this Set
- Front
- Back
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Angular Displacement
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ΔΘ = Θ - Θo
or ΔΘ = Θ when Θo = 0. |
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SI unit of angles
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Radian (rad)
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Average Angular Speed
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ψ = ΔΘ / Δt = (Θ - Θo) / (t - to) |
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SI unit for angular speed
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Radians / second
rad/s |
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Right hand rule for angular velocity
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When the fingers of your right hand are curled in the direction of circular motion, your extended thumb points towards the direction of the average angular speed
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Period
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Time required to complete one revolution
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Frequency
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The number of revolutions in one second
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SI Unit of Frequency
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Hertz
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SI unit of Period
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Seconds
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Centripetal Acceleration
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The acceleration of an object undergoing uniform circular motion is centripetal, meaning that it is directed towards the center of the circle defining its rotation.
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Equation for centripetal acceleration
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a = v^2 / r
Where r is the radius of rotation in meters |
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Centripetal Force
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The force required to cause centripetal acceleration.
Fc = m (v^2 / r) |
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Average Angular Acceleration
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α = Δψ / Δt Measured in radians / second^2 |
