As the rotational speed of a spring-supported 100-kg motor
Chapter 19, Problem 19.114(choose chapter or problem)
As the rotational speed of a spring-supported 100-kg motor is increased, the amplitude of the vibration due to the unbalance of its 15-kg rotor first increases and then decreases. It is observed that as very high speeds are reached, the amplitude of the vibration approaches 3.3 mm. Determine the distance between the mass center of the rotor and its axis of rotation. (Hint: Use the formula derived in Prob. 19.113.)
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