Angular frequency | Wikipedia audio article

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Angular_frequency


00:01:23 1 Units
00:02:01 2 Circular motion
00:02:29 2.1 Oscillations of a spring
00:03:56 2.2 LC circuits
00:04:49 3 See also
00:05:05 4 References and notes
00:05:41 5 External links



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SUMMARY
=======
In physics, angular frequency ω (also referred to by the terms angular speed, radial frequency, circular frequency, orbital frequency, radian frequency, and pulsatance) is a scalar measure of rotation rate. It refers to the angular displacement per unit time (e.g., in rotation) or the rate of change of the phase of a sinusoidal waveform (e.g., in oscillations and waves), or as the rate of change of the argument of the sine function.
Angular frequency (or angular speed) is the magnitude of the vector quantity angular velocity. The term angular frequency vector






ω
→





{\displaystyle {\vec {\omega }}}
is sometimes used as a synonym for the vector quantity angular velocity.One revolution is equal to 2π radians, hence




ω
=



2
π

T


=

2
π
f

,


{\displaystyle \omega ={{2\pi } \over T}={2\pi f},}
where:

ω is the angular frequency or angular speed (measured in radians per second),
T is the period (measured in seconds),
f is the ordinary frequency (measured in hertz) (sometimes symbolised with ν).