Unformatted text preview: When the weight is displaced and released, the period of vibration is 1.80 s, and the ratio of consecutive amplitudes is 4.2 to 1.0. Determine the amplitude and phase when a force F=2 cos 3t acts on the system. 5. (p. 3.5) A spring-mass is excited by a force F sin ω t. 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. M M...
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- Fall '08
- viscous damping device, Plot non-dimensional curves, force F0sin ωt