Figure QB is a schematic diagram of a nanoindenter where the column has a

mass mg the column support springs have a stiffness Ks Nm the load frame

has a compliance Cf mMN and the damping coefficient of the system is D

Nsm In this diagram S represents the stiffness of the contact between the

indenter tip and the sample to be tested. What are the natural angular frequency

and damping ratio of the system where there is no contact; iIt is before contact?