Eisco GP00016 Garage Physics Ballista

Description

Garage-Physics-Ballista-Eisco-GP00016-p-Eisco-GP00016-Garage-Physics-Ballista-This-kit-allows-students-to-explore-torsion-springs-forces-energy-transformation-mechanical-advantage-and-projectile-motion-Shoots-ping-pong-balls-over-30-ft-in-this-fully-functional-ballista-Launches-a-distance-of-more-than-30-ft-depending-on-launch-angle-and-string-tension-p-p-Students-use-only-wood-string-and-leather-to-create-one-of-the-most-efficient-weapons-of-siege-warfare-The-included-sta