I'm currently enrolled in a "into to physics" couse at college. I'm not doing so hot in the course, mainly because I can't understand the instructor. His native language is not english. His strategy of teaching doesn't work for me either. He tells you how to solve something, but he doesn't tell you why it needs to be done this way, and never refers to the book. With that minor explanation out of the way... We are currently in a section covering the theory behind physics. I'm having problems in actually working with the "formulas" or what not. I understand the working of the idea of friction, but can't follow the book on the usage of formulas. Is anyone willing to give me a break down on that?