Khan Academy
Khan Academy: Particle Calculations
Apply what you've learned to calculate the position and velocity of a particle over time with this 8-problem quiz/practice.
University of Virginia
Uva: The Real World Air Resistance
A contrast of Galileo and Aristotle's view of inertia and motion. Describes air resistance force and how its reality seems to initially support Aristotle's view.
NASA
Nasa: Beginner's Guide to Aerodynamics
This site from NASA uses a colorful graphic to illustrate why objects reach terminal velocity. Provides equation for the terminal velocity of an object. Graphic is accompanied by a simple explanation.
Physics Classroom
The Physics Classroom: Skydiving
The Physics Classroom offers this animation depicting the forces acting upon a falling skydiver.
NASA
Nasa: The Way Things Fall
This site from NASA compares free falling motion to falling with air resistance. Discusses Galileo's experiment. Explains why we believe all objects free fall with the same acceleration.