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.
PBS
Pbs Learning Media: Balloon Car
Make 4-wheeled, air-powered cars that jet across the floor. Experiment with the design process and thrust in this activity from Design Squad Nation.
Khan Academy
Khan Academy: What Is Centripetal Acceleration?
Learn what centripetal acceleration means and how to calculate it. Included are two example problems with solutions.
McREL International
Mc Rel: Whelmer #9 Learning Activity: Nickel Karate
An easy to do activity that investigates the basic theories of inertia. The activity is in lesson plan format that meets NSES standards.
McREL International
Mc Rel: Whelmer #12 Learning Activity: Bernoulli Cans
An easy to do activity that investigates Bernoulli's principle. The activity is presented in lesson plan format that meets NSES standards.
McREL International
Mc Rel: Whelmer #33 Learning Activity: Density Balloon
A simple activity that investigates the effect of heat on the volume of a gas. The activity is presented in lesson plan format that meets NSES standards.