Example 1 53 Equivalent mass and spring using energy

MECHANICAL VIBRATIONS
Find the equivalent mass and find the equivalent constant of the springs of the system shown in Figure. Consider that the center of mass of the Bell crank is located at O and therefore its position does not change when the crank is rotating.
Problem 1.53 from Text Book S. Rao, Mechanical Vibrations,
Carmen Muller-Karger, Ph.D.
Florida International University