3. A 75-kg electric motor (Figure QB1.3) turns an eccentric flywheel, which is equivalent to an unbalanced 0.12-kg mass located 260 mm from the axis of rotation. a. If the static deflection of the beam is 25 mm because of the mass of the motor, determine the angular velocity of the flywheel at which resonance will occur. Neglect the mass of the beam. [4 marks] Jan 2020 Figure QB1.3 Electric motor supported by a foundation modelled as a simply supported beam Page 8 of 16 5104MECH Applied Mechanics 2 b. What will be the amplitude of steady-state vibration of the motor if the angular velocity of the flywheel is 22 rad/s [7 marks]