This is a physics book by Benjamin Crowell that explains high school level conceptual physics.
- Conservation of Mass and Energy
- Conservation of Momentum
- Conservation of Angular Momentum
- The Ray of model of Light
For a semester-length course, all seven chapters can be covered. For a shorter course, the book is designed so that chapters 1, 2, and 5 are the only ones that are required for continuity; any of the others can be included or omitted at the instructor’s discretion, with the only constraint being that chapter 6 requires chapter 4.