The two blocks A and B each have a mass of 5 kg and are suspended from parallel cords. A spring having a stiffness of K = 60 N/n, is attached to B and is compressed 0.3 m against A and B as shown. Determine the maximum angles θ and ǿ of the cords when the blocks are released from rest and the spring becomes unstretched.

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2 m 2 ITm