Related HowStuffWorks Articles
- Football Quiz
- How NFL Equipment Works
- How the First-Down Line Works
- How Force, Power, Torque and Energy Work
- How EyeVision Works
- How Performance-Enhancing Drugs Work
- How do they superimpose the first down line onto the field on televised football games?
- How are the college football rankings determined?
- How does the NFL's salary cap work?
More Great Links
- NCSU: The Science House
- Exploratorium: Sport! Science
- American Institute of Physics: Football Physics
- Football Physics: a Series of Short Quick-Time Vignettes by University of Nebraska Physics Professor Tim Gay