Physical Simulation
Game Loop - Game Programming Patterns
Chapter from Game Programming Patterns explaining different design decisions for a game loop
Fix Your Timestep! (2004)
Classic article on implementing a fixed timestep game loop for stable physics simulation.
CSC417/CSC2549 - Physics-based Animation
University course lectures on physics-based animation
Real-time Collision Detection (2005)
A good reference book on collision detection, collision response, and various acceleration data structures.