Question: A vertical force P is applied to the linkage at B. The constant of the spring is 12.5 lb/in., and the spring is un-stretched when

A vertical force P is applied to the linkage at B. The constant of the spring is 12.5 lb/in., and the spring is un-stretched when AB and BC are horizontal. Neglecting the weight of the linkage, determine the magnitude of P so that θ =25° when the system is in equilibrium.

15 in. 15 in

15 in. 15 in

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