By: Robert Farber, Central High School, Philadelphia, PA
Item #: AP6376
In the Bottle Balance Beam Demonstration Kit for physical science and physics, the water bottle and wooden board seem to defy gravity. An attention-getting and memorable demonstration of the concept of the center of gravity.
This balancing act will be a real attention getter! Students will remember the concept of the center of gravity involved in this demonstration. A large water-filled bottle and a wooden board seem to defy gravity as together they balance on the board’s edge. You have to see it to believe it! Includes detailed instructions and a reproducible student worksheet. Concepts: Center of gravity, gravity, balance. Time Required: 10 minutes Materials Provided: Pre-cut balancing board, 2-L bottle with cap. Note: An innovative density demonstration can also be performed using blue kerosene and mineral oil, available separately.