Using the method of Sec. 10.8, solve Prob. 10.38. Problem 10.38: A cord is wrapped around drum A which is attached to member AB. Block D can move freely in its guide and is fastened to link CD. Neglecting the mass of AB and knowing that the spring is of constant 800 N/m and is undeformed when θ = 0, determine the value of θ corresponding to equilibrium when a downward force P of magnitude 480 N is applied to the end of the cord.

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375 mm D. 75 mm P.