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of the motion of each mass, for the two cases, relative to F₁.

In the plots at right, the black line shows the baseline response (m₂ = 0). Now considering m₂ = , the blue line shows the motion of the damping mass and the red line shows the motion of the primary mass. The amplitude plot shows that at low frequencies, the damping mass resonates much more than the primary mass. The phase plot shows that at low frequencies, the two masses are in phase. As the frequency increases m₂

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