TeachEngineering
Teach Engineering: What a Drag
Students learn about friction and drag - two different forces that convert energy of motion to heat. Both forces can act on a moving object and decrease its velocity. Students learn examples of friction and drag, and suggest ways to...
Science Struck
Science Struck: A Comprehensive List of All the Physics Formulas
Provides a long list of physics formulas for easy reference.
Khan Academy
Khan Academy: A Ramp in an Administrative Office
This passage will test your knowledge on forces on inclined planes.