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An industrial-fan system, a model of which is shown in Figure E8.23, is found to experience undesirable vibrations when operated at 600 rpm. It is assessed that these undesirable vibrations are due to a mass unbalance in the fan, and it is estimated the mass unbalance mo = 2 kg is located at a distance ε = 0.5 m from the point O shown in Figure E8.23. Design a vibration absorber for this industrial-fan system with the restriction that the mass of the absorber cannot exceed 75 kg.
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