A slender uniform rigid bar of mass m is hinged at O and supported by – McqOptions

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1.	A slender uniform rigid bar of mass m is hinged at O and supported by two springs, with stiffnesses 3k and k, and a damper with damping coefficient c, as shown in the figure. For the system to be critically damped, the ratio \(\frac{c}{\sqrt {km} }\) should be
A.	2
B.	4
C.	2√7
D.	4√7
Answer» E.

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