Abstract
We use numerical experiments to investigate the possibility that dynamical friction could produce dynamical heating. We consider a system of test particles orbiting around a massive particle; this system is immersed in a sea of massive particles that have both random and systematic motions. The latter forces the system of test particles to move through dynamical friction, but we found that changes in the internal energy of the system, if present, should be very small. Key words: STARS-STELLAR DYNAMICS