A motor is installed at the base-plate and its total mass is 1200 kg, and the motor rotates at 1350 RPM. ?
There are some springs available with a combined stiffness of 1120 kN/m and damping ratios of 0.1, 0.05 and 0.01. The motor will be turned on and off periodically. Calculate and select the most suitable choice of spring for the motor and its base-plate with the support of reasons.
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