Question: A motor, operating on 60 Hz power, has high vibration in the axial direction on the end brackets. The vibration frequency is 7,200 cpm. The

A motor, operating on 60 Hz power, has high vibration in the axial direction on the end brackets. The vibration frequency is 7,200 cpm. The motor is only running at 1,180 rpm. What is the excitation force that is exciting the end bracket?

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