The dynamics of local magnetic flux vortexes in high-temperature semiconductors is studied with a mechanical method. Physical conditions in a gradient magnetic field are analyzed. Obtained results are treated within a model of free and pinned vortexes. The magnitudes of elastic modula, pinning strength, dissipated energy, viscous friction of the vortexes, and pinning potential were calculated. The method allows the determination of local, rather than integrated, superconductor characteristics. This makes it possible to map pinning centers over the crystal structure.