Waves and vibrations. These confuse me allot. For the fist question I got (iF co

Question

Waves and vibrations. These confuse me allot. For the fist question I got (iF cos(phi))/s and for the rest I am completely stumped.

2. The dsplacement of a forccd mechanical oscllator is given by 0 e (ot-)) where . r, s, FO and m are constant and do is the frequency of oscillation. Show that the following are frequency independent (a) the displacement amplitude at low frequencies (0-0) (b) the velocity amplitude at velocity resonance (c) the acceleration amplitude at high frequencies ( oo). 1151

Explanation / Answer

a. at w-> 0
x = -l*Fo*e^(-l(phi))/s
b. at, resonance
v = -l^2*Fo(exp)(l(wt - phi))/r

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