Introduction Some questions you concern: 1 Why should we study English? 2 Why we study physics in English? 3 How about the achievement in final exam? 4 Is it helpful for your future career to study physics in English?
Chapter 8 Energy and Conservation Law 1. Work and Energy 2. Kinetic Energy(能)&work- Energy Principle 3. Conservative(保守) and Noncons Forces 4. Potential Energy(势能) 5. Conservation Snarav