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Description
Build a ballista, a siege engine once used by the Greeks and Romans, to teach kinematics and projectile motion. The ballista uses torsion spring bundles and lever arms and can launch Ping-Pong® balls more than 30 ft. Study conservation of energy, Newton's third law, and parabolic trajectories using the 4 separate angular settings of the ballista.
Build a ballista, a siege engine once used by the Greeks and Romans, to teach kinematics and projectile motion. The ballista uses torsion spring bundles and lever arms and can launch Ping-Pong® balls more than 30 ft. The 2 lever arms pull on the pouch, accelerating the Ping-Pong® ball away from the ballista. Study conservation of energy, Newton's third law, and parabolic trajectories using the 4 separate angular settings of the ballista.
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If for any reason you are not satisfied with this item, it is eligible for a return, exchange, refund, or credit up to 180 days from date of purchase. Restrictions may apply. Returns & Exchanges Policy.