Abstract
Some dynamical properties of a particle suffering the action of a
generic drag force are obtained for a dissipative Fermi Acceleration
model. The dissipation is introduced via a viscous drag force, like a
gas, and is assumed to be proportional to a power of the velocity: F
alpha -nu(gamma). The dynamics is described by a two-dimensional
nonlinear area-contracting mapping obtained via the solution of Newton's
second law of motion. We prove analytically that the decay of high
energy is given by a continued fraction which recovers the following expressions: (i) linear for gamma = 1; (ii) exponential for gamma = 2; and (iii) second-degree polynomial type for gamma = 1.5. Our results are
discussed for both the complete version and the simplified version. The
procedure used in the present paper can be extended to many different
kinds of system, including a class of billiards problems. (C) 2012
Elsevier B.V. All rights reserved.
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