  The effect of the frame dragging on the equation of motions, depends on the
approaches that have been considered. Accordingly, additional force terms may
appear or disappear. To understand the effect of radial and non-radial
perturbations that may exist in the case of mass distribution of spherical
shell form, modifications should be predicted to the approaches of the
components of elastic tensor $E^{\mu\nu}$ given in Bass and Pirani (1955).
Different relations between $\omega$ and $\omega'$ have been discussed.
