2. Two uniform links OB and BP are attached/pinned to the ground at O and the massless block at P. The rod OB has mass m and length L, while the rod BP has mass m/2 and length L/2, respectively. There is a linear spring of stiffness k attached to the block at P on one end and to the wall at the other end. The system is in vertical plane. The spring is unstretched when the two rods are horizontal, that is, 0=0, and OP=3L/2. Use the Principle of Virtual Work to find the equilibrium position of the system in terms of the angle 9. m L www 10 m,L 2 22 EN B