A spring-mass suspension has a natural frequency of 40 rad/s. What is the damping ratio required if it is desired to reduce this frequency to 20 rad/s by adding a damper to it?

A spring-mass suspension has a natural frequency of 40 rad/s. What is

1.	A spring-mass suspension has a natural frequency of 40 rad/s. What is the damping ratio required if it is desired to reduce this frequency to 20 rad/s by adding a damper to it?
A.	\[\frac{\sqrt{3}}{2}\]
B.	\[\frac{1}{2}\]
C.	\[\frac{1}{\sqrt{2}}\]
D.	\[\frac{1}{4}\]
Answer» B. \[\frac{1}{2}\]

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A spring-mass suspension has a natural frequency of 40 rad/s. What is the damping ratio required if it is desired to reduce this frequency to 20 rad/s by adding a damper to it?

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