Gay approaches football like a detective, constantly trying to strip away the superficial aspects to attack the core questions at the center of the game. For example, he demonstrates why it's important to stay low while tackling. It's not because you'll exert a larger force on the ball carrier that way but because you'll impart a torque around your opponent's center of mass and rotate him straight onto his back. From there, Gay proceeds to examine optimal pursuit strategies, the flight of a spiral pass, even the flow of the "wave" around the stadium and how its speed depends
on how cold the fans are. In a sport so dominated by force, energy and momentum, Football Physics serves as an insightful user's manual, your guide to understanding the true essentials of the game.