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Question 2 A damped natural frequency of a system as obtained from a free vibration test is 14.6 Hz. During the forced vibration test with constant excitation force on the same system, maximum amplitude of vibration is found to be 12.4 Hz. Find the damping ratio/factor (C) for the system if the damping constant is 0.95 Ns/mm and mass of 5 kg.
Sagot :
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