Question: A spring-mass system is excited by a force F0 sin t. At resonance the amplitude is measured to be 0.58 cm. At 0.80 resonant frequency,

A spring-mass system is excited by a force F0 sin ωt. At resonance the amplitude is measured to be 0.58 cm. At 0.80 resonant frequency, the amplitude is measured to be 0.46 cm. Determine the damping factor ζ of the system.

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System Dynamics 3rd edition by William Palm III