A mass m2 is attached at a fixed length to a swinging pendulum. The distance from the pendulum to mass m is x. Attached to the end of mass m by a spring of stiffness k is another mass m. Two external foces of F and F2 are acting on the two masses in the horizontal direction. The length from the hinge of the pendulum to mass m is L. The spring's unstretched length is Lo. Find the equations of motion using the Lagrange method. b b x 21 m2 F2 F1