Website
Physics Classroom

The Physics Classroom: Acceleration

For Students 9th - 10th
Topics covered include what acceleration is, the difference between constant and non-constant acceleration, acceleration in a free-falling object, the equation used to compute acceleration, and the difference between positive and...
Website
NASA

Nasa: Beginner's Guide to Aerodynamics

For Students 9th - 10th
Includes exhaustive information and a wealth of activities pertaining to aerodynamics and the physics of flight.
Website
Other

University of Alaska: Terminal Velocity

For Students 9th - 10th
University of Alaska physics professor site explaining the concept of terminal velocity. Uses the terminal velocities of humans and cats for comparison. Site contains an interesting graph of the percent fatalities versus stories fallen.
Website
University of Maryland

University of Marylad: Computer Tutorials in Physics: Air Resistance

For Students 9th - 10th
This site has a discussion of a college physics project in which the motion of an object under the influence of air resistance was modeled and studied. Procedure and modeling software are described and the results and the findings are...