A washing machine system is designed and the simplified model is shown in the

following figure. The total mass of the machine is $M=65kg,$ also the machine is

supposed to carry load of $m=1kg$ that rotates with eccentricity $e=10mm$ at angular

rate $=80ra\frac{d}{s}.$ Initially, the vibration isolation with stiffness $k=416000\frac{N}{m}$ and

dashpot coefficient $c=212N\frac{s}{m}$ are implemented for the machine. The system is

found to have arsevere vibration problem. Which of the following changes do not

help with improving the vibration problem?

$($Additional info: Refer to the Vibration notes, discussed in the

to find the

right answer$).$