Cosmos 4 kids
Cosmos4 Kids: Force of Gravity
Learn about the force of gravity in this article. Also, view a video that shows angry birds and pigs go weightless!
Physics Classroom
The Physics Classroom: Newton's Laws: Elevator Ride Interactive
Have you ever felt that queasy feeling in a moving elevator? Explore the physics behind the sensations of weightlessness and weightiness. Teacher notes and a downloadable handout are also provided.