A 220-lb motor is bolted to a light horizontal beam. The unbalance of its rotor is equival...

A 220-lb motor is bolted to a light horizontal beam. The unbalance of its rotor is equivalent to a 2-oz weight located I in. from the axis of rotation, knowing that resonance occurs at a motor speed of 400 rpm, determine the amplitude of the steady-state vibration at (a) 800 rpm, (b) 200 rpm. (c) 425 rpm.

Fig. P19.117