Vacuum bazooka
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This amazing device attaches to a vacuum cleaner and launches lightweight, hollow projectiles at high velocity.
When aimed vertically typical heights reached are 5 to 6 meters. Additional weights can be added to the projectiles for all manner of investigations into energy, acceleration, momentum etc. An essential item to brighten up the subject of dynamics or to amaze everyone on open days and science fairs. As featured in the book “Vacuum Bazookas and Electric Rainbow Jelly” by Neil Downie.