20 mm from the disk's center, determine the angular velocity o at which resonance occurs. Assume that the motor only vibrates in the vertical direction.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Which one is the correct answer please ?
The clectric motor has a mass of 50 kg and is supported by
four springs, each spring having a stiffness of 100 N/m. If
the motor turns a disk D which is mounted eccentrically,
20 mm from the disk's center, determine the angular
velocity o at which resonance occurs. Assume that the
motor only vibrates in the vertical direction.
20 mm
W = Wn = 2.83 Hz
W = Wn = 2. 83 rad/s
w < Wi = 2. 83 rad/s
W > Wn = 2. 83 Hz
Transcribed Image Text:The clectric motor has a mass of 50 kg and is supported by four springs, each spring having a stiffness of 100 N/m. If the motor turns a disk D which is mounted eccentrically, 20 mm from the disk's center, determine the angular velocity o at which resonance occurs. Assume that the motor only vibrates in the vertical direction. 20 mm W = Wn = 2.83 Hz W = Wn = 2. 83 rad/s w < Wi = 2. 83 rad/s W > Wn = 2. 83 Hz
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