A 100-lb motor is directly supported by a light horizontal
Chapter 19, Problem 19.146(choose chapter or problem)
A 100-lb motor is directly supported by a light horizontal beam which has a static deflection of 0.2 in. due to the weight of the motor. The unbalance of the rotor is equivalent to a weight of 3.5 oz located 3 in. from the axis of rotation. Knowing that the amplitude of the vibration of the motor is 0.03 in. at a speed of 400 rpm, determine (a) the damping factor \(c / c_{c}\), (b) the coefficient of damping c.
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