ACTION PRINCIPLE FOR A KIND OF MECHANICAL SYSTEM WITH FRICTION FORCE

CHENGSHI LIU
Department of Mathematics, Daqing Petroleum Institute, Daqing 163318, China
E-mail address: chengshiliu-68@126.com

Received 20 June 2006;        Revised manuscript received 5 August 2008
Accepted 3 September 2008  Online 25 September 2008

A least action principle for mechanical systems with friction was obtained. Some action principles, such as El-Nabulsi's fractional action-like variational approach, are given as the special cases.

PACS numbers: 02.30.Xx, 46.40.-f
UDC 531.553, 534.112

Keywords: action principle, nonconservative system