This authored textbook is aimed at upper-level students in physics, engineering, and other sciences. Its subject refers to the classical mechanics of today and is essential to the training of physicists as well as being useful in a variety of industrial and commercial applications having to do with the design of moving equipment in the automobile, aerospace, and control devices industry. The authors have important exercises which are to be done using a computer to solve linear and nonlinear problems and to have a graphical representation of results. An extensive Appendix on computer methods from Fortran and Mathcad enhance the appeal of the book to meet current needs.