A drum, of mass M, is rigidly fixed at the end of a circular steel shaft. The shaft is clamped at one end supported by a plain bearing at the other. A mass, m, is supported by an inextensible string enrolled around a drum of radius 2. The spring with constant k is attached to a drum of radius r and is in pre-tension with a force Fo at the static equilibrium position. The radius of gyration of the two combined concentric and attached drums is kg. Find the equation of motion of the system in terms of the coordinate shown. bearing Front view Side view