phase difference between driving force and damping oscillator

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Offline sr1609

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In  a forced damped oscillator ,maximum phase difference between sinusoidal driving force and damping oscillator is ∏ . why ?. can't be it more than ∏ ?

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Offline Colin2B

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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, ∏?
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Offline evan_au

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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"...