One of the tail rotor blades of a helicopter has an unbalance mass of m=0.5 kg at a distance ofe=0.15 m from the axis of rotation, as shown in the

figure below. The tail section has a length of 4 m, a mass of 240 kg, a flexural stiffness (EI) of 2.5 x 106 N-m², and a damping ratio of 0.15. The mass of the tail rotor blades, including their drive system is 20 kg.Determine the amplitude of steady state response of the tail section when the blade rotates at 1500 rpm.