The 20-kg variable-speed motorized unit is restrained in the horizontal direction by two...

The 20-kg variable-speed motorized unit is restrained in the horizontal direction by two springs, each of which has a stiffness of 2.1 kN/m. Each of the two dashpots has a viscous damping coefficient In what ranges of speeds N can the motor be run for which the magnification factor M will not exceed 2?