The unbalanced rotor shown in the figure is pinned to a frame and supported by a spring and damper. The total mass is measured as m = 200kg. When the system is operated at w = 25rad/s the phase o of the response with respect to the rotation of the unbalanced disk is measured to be /2rad and the steady- state vibration amplitude is X = 2.00cm. When the rotation rate of the disk is much larger than this value the amplitude reduces to X 0.50cm. Find the stiffness and damping constant for the foundation and the distance between the center of rotation C and the mass center G. G m