2. A fixed-fixed steel beam, of length 5 m, width 0.5 m, and thickness 0.1 m, carries an electric motor of mass 75 kg and speed 1200 rpm at its mid-span, as shown in Figure. A rotating force of...

Extracted text: 2. A fixed-fixed steel beam, of length 5 m, width 0.5 m, and thickness 0.1 m, carries an electric motor of mass 75 kg and speed 1200 rpm at its mid-span, as shown in Figure. A rotating force of magnitude P, = 5000 N is developed due to the unbalance in the motor. Find the amplitude of steady-state vibrations by disregarding the mass of the beam. What will be the amplitude if the mass of the beam is considered by replacing with a mass lumped at the center equal to 25% of actual distributed mass. Take E = 207 Gpa and y = 76.5 kN/m³ for steel Ans: 4.15*104 m (w/o beam's mass) and; 11.5*10-4 m (with beam's mass)