2.81 A mass m₁ is attached at one end of a uniform bar of mass m₂ whose other end is pivoted at point ✪ as shown in Fig. 2.101. Determine the natural frequency of vibration of the resultingpendulum for small angular displacements. Mass moment of inertia for a uniform rod is given below. (For this problem you will need to find the equivalent moment of inertia about the pivot point O for the uniform rod, and the point mass, in order to then find on I=\frac{1}{3} M L^{2}