Circular motion
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6 Terms
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Time period
The time to complete one revolution:
T = 1 / frequency, s
T = 2π / angular velocity
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Frequency
Number of revolutions per minute:
F = 1 / Time period, Hz
f = angular velocity / 2π
3
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Angular velocity
w = angle swept / time, rads^-1
w = frequency x 2π
w = 2π / Time period
4
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Centripetal acceleration
A body moving at a constant speed around a circular path is accelerating towards the centre:
a = velocity² / radius, ms^-2
a = radius x (angular velocity)²
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Centripetal force
Resultant force acting towards the centre of a circular motion:
F = mass x velocity² / radius, N
F = mass x radius x (angular velocity)²
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