If an additional mass is attached to the vibration system at

If an additional mass is attached to the vibration system at the circumference of its rotating component, the displacement of the system due to that mass will be maximum when Select one: rotational speed matches with natural frequency of the system rotational speed reaches the minimum rotational speed varies within the maximum and the minimum rotational speed reaches the maximum

Solution

If an additional mass is attached to the vibration system at the circumference of its rotating component, the displacement of the system due to that mass will be maximum when rotational speed matches with natural frequency of the system. This happens because at equilibrium position, the velocity reaches a maximum.