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Statement of a problem № 3410

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A periodic force acts on a 6 kg mass suspended from the lower end of a vertical spring of constant 150 N/m. The damping force is proportional to the instan- taneous speed of the mass and is 80 N when v = 2 m/s. find the resonance frequency.

Solution:
A periodic force acts on a 6 kg mass suspended from the lower end of a vertical

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