Mechanical impedance (Z_{r s}(i omega)) is a. (left[m_{r s} ddot{vec{x}}+left[c_{r s} dot{vec{x}}+left[k_{r s} ight] vec{x} ight. ight.)

Mechanical impedance \(Z_{r s}(i \omega)\) is

a. \(\left[m_{r s} \ddot{\vec{x}}+\left[c_{r s} \dot{\vec{x}}+\left[k_{r s}\right] \vec{x}\right.\right.\)

b. \(\left\{\begin{array}{l}X_{r}(i \omega) \\ X_{s}(i \omega)\end{array}\right\}\)

c. \(-\omega^{2} m_{r s}+i \omega c_{r s}+k_{r s}\)