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An inverted pendulum consisting of a sphere of weight W and a rigid bar ABC of length l and negligible weight is supported by a pin and bracket at C. A spring of constant k is attached to the bar at B and is undeformed when the bar is in the vertical position shown. Determine

(a) the frequency of small oscillations,

(b) the smallest value of a for which these oscillations will occur.

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Reference No.:- M92200512

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