1.

The Smallest and largest natural frequencies of a 'n' degree freedom system are ω1 and ωn respectively. The approximate natural frequency estimated by Rayleigh’s and Dankerley’s methods is ωr and ωd respectively. Which of the following statements is true?

A. ωr < ω1 and ωd < ω1
B. ωr < ω1 and ωd > ω1
C. ωr > ω1 and ωd > ω1
D. ωr > ω1 and ωd < ω1
Answer» E.


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