Egydio De Carvalho, R. [UNESP]Vieira Abud, C. [UNESP]Caetano Souza, F.2022-04-282022-04-282008-03-07Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, v. 77, n. 3, 2008.1539-37551550-2376http://hdl.handle.net/11449/225073Some properties of the annular billiard under the presence of weak dissipation are studied. We show, in a dissipative system, that the average energy of a particle acquires higher values than its average energy of the conservative case. The creation of attractors, associated with a chaotic dynamics in the conservative regime, both in appropriated regions of the phase space, constitute a generic mechanism to increase the average energy of dynamical systems. © 2008 The American Physical Society.engArtigo10.1103/PhysRevE.77.0362042-s2.0-40949089609