PBS
Pbs Teachers: Dead Men's Tales: Splatter Spread
Emulate the work of a forensic scientist by observing the relationship between scatter and distance. Assemble a projectile-hurling device called a potato cannon and analyze the spread pattern of paint soaked projectiles.
National High Magnetic Field Laboratory
Magnet Academy: How Potato Cannons Work
A slideshow carbo-loaded with information on how the pneumatic potato cannon works. [3:00]