This is the video of a middle school team's experiment in NASA's WING competition. This is an excellent study of forces and motion. Initially, the two balloons (one with a magnet inside, the other with iron filings inside) hang straight down due to gravity. When the experiment is dropped, it experiences microgravity and the stretched string pulls the balloons upward. The magnetic attraction between the balloons then pulls them together.
The WING experiments experience weightlessness (aka microgravity or "zero gravity") as they are dropped in the NASA Glenn 2.2 Second Drop Tower.
This experiment was designed and built by middle school students in the Dallas School District in Dallas, Pennsylvania.
More info may be found here: http://spaceflightsystems.grc.nasa.gov/DIME.html
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