In a system, two connected rigid bars AC and BC are of identical length L with pin supports at A and B. The bars are interconnected at C by a friction less hinge. The rotation of the hinge is restrained by a rotational spring of stiffness, k. The system initially assumes a straight line configuration, ACB. Assuming both the bars as weightless, the rotation at supports, A and B, due to a transverse load, P applied at C is: