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Qn. In a forced mechanical oscillator, show that the following are frequency independent.

i) the mechanical amplitude at low frequencies.

ii) the velocity amplitude at velocity resonance.

iii) the acceleration amplitude at high frequencies.

how do i start?

i know that the formual for

displacement= F/wZ sin (wt -teta)

where Z= sqrt[ r sq + ((mw - s/w) sq) ]

velocity= F/Zm cos (wt- teta)

how to go about in this question?