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A small rotating machine weighing 250 kg runs at a constant speed of 6000 rpm. The machine was installed in a building and it

A small rotating machine weighing 250 kg runs at a constant speed of 6000 rpm. The machine was installed in a building and it was discovered that the system was operating at resonance. What is the stiffness of the undamped absorber to reach zero transmissibility, note that the mass ratio u is chosen to be 0.25? Select one: O a. 24674 kN/m Ob. 27635 kN/m Oc. 21713 kN/m Od. 20733 kN/m

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