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A rotor is mounted in bearings that are free to move in a single plane, as shown in Figure. The rotor is symmetrical about 0 with total mass M and moment of inertia Jo

1682_axis perpendicular.jpg

about an axis perpendicular to the shaft. If a small unbalance mr acts at an axial distance b from its center 0, determine the equations of motion for a rotational speed w.

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