%0 Journal Article %T One Dimensional Relativistic Particle in a Quadratic Dissipative Medium Subjected to a Force That Depends on the Position %A Federico Petrovich %J Journal of Modern Physics %P 1185-1188 %@ 2153-120X %D 2015 %I Scientific Research Publishing %R 10.4236/jmp.2015.69122 %X We will find a constant of motion with energy units for a relativistic particle moving in a quadratic dissipative medium subjected to a force which depends on the position. Then, we will find the Lagrangian and the Hamiltonian of the equation of motion in a time interval such that the velocity does not change its sign. Finally, we will see that the Lagrangian and Hamiltonian have some problems. %K Lagrangian %K Hamiltonian %K Constant of Motion %K Dissipation %K Relativistic %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=58533