In the viscous damped vibration, the logarithmic decrement value over five cycles is found to be 8.11. What is viscous damping factor of vibratory system?

In the viscous damped vibration, the logarithmic decrement value over

1.	In the viscous damped vibration, the logarithmic decrement value over five cycles is found to be 8.11. What is viscous damping factor of vibratory system?
A.	20%
B.	25%
C.	30%
D.	15%
Answer» C. 30%

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