Question: b ) The homogeneous 2 5 0 kg rectangular block is pivoted about a horizontal axis through O and supported by two springs, each of

b) The homogeneous 250 kg rectangular block is
pivoted about a horizontal axis through O and
supported by two springs, each of stiffness S.
The base of the block is horizontal in the
equilibrium position. Determine the minimum
stiffness S of the springs which will ensure
vibration about the equilibrium position of 15 Hz .
(11.8kNm)
b ) The homogeneous 2 5 0 kg rectangular block is

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