Discussion
Critical damping is the amount that
Answer: D
Correct answer: just prevents oscillation from occurring
Critical damping is the smallest amount that returns a displaced system to rest without overshoot, so at that value the motion is no longer oscillatory. It serves as the reference against which real damping is expressed - five per cent damping means five per cent of critical - and it makes the damping ratio a dimensionless number comparable between structures.
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