Globus model for magnetization processes in polycrystalline materials has led to significant improvements in the recognition of the contribution from different microstructural parameters. In this paper we present an analysis of the friction (pinning) term and the wall energy term that appear in the model. Experimental results show that the ratio of these terms is a constant, independent of temperature and the same for two different ferrites, YIG and Ni0.5Zn0.5Fe2O4. This result is analyzed by considering that the origin of the friction is the destruction of the wall, the shape of the grains, and the effect of demagnetizing fields.