A machine weighing 250 lb is mounted on a supporting system consisting of four springs and four dampers. The vertical deflection of the supporting system under the weight of the machine is measured as 0.80 in. The dampers are designed to reduce the amplitude of the vibration to 1/8 of the initial amplitude after two complete cycles of the free vibration. Find the following properties of the system: a) undamped natural frequency b) damping ratio and c) damped natural frequency. Comment on the effect of damping on the natural frequency.

Q: Critical damping of the system ?

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