Physics Classroom
The Physics Classroom: Elephant & Feather (Free Fall)
A demonstration involving an elephant and a feather and explanation of why all objects maintain the same acceleration in the state of free fall without any air resistance.
Annenberg Foundation
Annenberg Learner: Amusement Park Physics: The Principles of Free Fall
An article describing free fall principles in roller coaster rides. In addition to the explanation of free fall, an experiment is described that allows you to test free fall with a cup of water. Part of a larger presentation on roller...
Physics Classroom
The Physics Classroom: Introduction to Free Fall
A lesson on free fall covers the fact that free-falling objects do not encounter air resistance and all free-falling objects (on Earth) accelerate downwards at a rate of approximately 10 m/s/s (to be exact, 9.8 m/s/s).