# The Naked Scientists Forum

### Author Topic: phase difference between driving force and damping oscillator  (Read 896 times)

#### sr1609

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##### phase difference between driving force and damping oscillator
« on: 27/08/2015 17:05:19 »
In  a forced damped oscillator ,maximum phase difference between sinusoidal driving force and damping oscillator is ∏ . why ?. can't be it more than ∏ ?

#### Colin2B

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##### Re: phase difference between driving force and damping oscillator
« Reply #1 on: 27/08/2015 18:03:31 »
This sounds like a homework question, so I will point you in this direction:
If you have a driving force the motion of the 'driven' must lag behind the motion of the driver. What would happen if the phase lag went beyond antiphase, 180°, ∏?

#### evan_au

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##### Re: phase difference between driving force and damping oscillator
« Reply #2 on: 28/08/2015 14:45:54 »
Angles here are measured in radians. There are 2π radians in a complete cycle.

In the steady state, with driver and load in synchronisation, the phase difference cannot exceed the range ±π.

Think what it means if the "driver" lags behind the "load"...

#### The Naked Scientists Forum

##### Re: phase difference between driving force and damping oscillator
« Reply #2 on: 28/08/2015 14:45:54 »