Wikimedia
Wikipedia: Charles Augustin De Coulomb
Spanish-language site lets students discover the life and work of this physicist and engineer, who is known for his studies of electric charges.
Science Struck
Science Struck: A Comprehensive List of All the Physics Formulas
Provides a long list of physics formulas for easy reference.
Ohio State University
Ohio State Univ.: Simple Machines & Mechanical Advantage [Pdf]
This site details how simple machines create a mechanical advantage for humans. Levers, theoretical mechanical advantage, actual mechanical advantage, and pulley systems are discussed.