Numerical - Resonant frequency for given damping and natural frequency

Q.  If a system is said to have a damping ξ = 0.5532 with the natural frequency ωn = 2 rad/sec, what will be the value of resonant frequency (ωr)?
- Published on 09 Oct 15

a. 1.2456 rad/s
b. 1.7352 rad/s
c. 2.3421 rad/s
d. 3.66 rad/s

ANSWER: 1.2456 rad/s

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