Torsional pendulum, logarithmic decrementby tone999 Tags: decrement, logarithmic, pendulum, torsional 

#1
Jul2109, 06:33 PM

P: 18

1. The problem statement, all variables and given/known data
The amplitude of a torsional vibration decreases so that the amplitude on the 100th cycle is 13% of the the amplitude of the first cycle. Determine the level of damping in terms of the logarithmic decrement. 2. Relevant equations 3. The attempt at a solution Is this simply ln(100/13)= 2.04 or ln(13/100)= 2.04? 


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