[ A complete course on Lagrangian mechanics (the stuff you need to solve mechanics problems more complicated that the simple types of motion covered by Newtonian mechanics), with each equations are actionable.]
http://mitpress.mit.edu/sicm/book-Z-H-11.html
[ A complete course on Lagrangian mechanics (the stuff you need to solve mechanics problems more complicated that the simple types of motion covered by Newtonian mechanics), with each equations are actionable.] http://mitpress.mit.edu/sicm/book-Z-H-11.html