If velocity is not large,then on which factor does the damping force on an oscillator in a medium depend?

What is the amplitude of a damped oscillator if time becomes $t = 2m$?

In damped oscillation,the graph between velocity $(V)$ and position $(x)$ will be:

For the damped oscillator shown in the figure,the mass $m$ of the block is $200 \; g$,$k = 90 \; N m^{-1}$,and the damping constant $b$ is $40 \; g s^{-1}$. Calculate:
$(a)$ the period of oscillation,
$(b)$ the time taken for its amplitude of vibrations to drop to half of its initial value,and
$(c)$ the time taken for its mechanical energy to drop to half its initial value.

In case of a forced vibration,the resonance wave becomes very sharp when the:

What are damped oscillations?