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The damped natural frequency is

a.       Lower or equal to the undamped natural frequency  b.      Same as  undamped natural frequency c.       Higher than undamped natural frequency d.      Is zero

1 Answer

Damped natural frequency is always lower than undamped natural frequency.
This is equivalent to roots of a quadratic equation.
If they are real roots it is akin to a undamped system., if they are complex conjugate with large imaginary value then it is lowly damped & it is critically damped if the roots just break as real numbers.
Hence a is the correct answer.
answered Dec 10, 2013 by meena.p

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