A toy trebuchet might seem harmless, but even a small projectile can cause eye damage. Safety note: Never aim projectiles at people or animals. Assemble all your materials in a location that is open and clear of people, animals or breakable objects so that you can test your trebuchet.Glue (A hot glue gun is best if available, but use caution and adult assistance when using hot glue.).Piece of corrugated cardboard, about one foot by one foot.Many medieval trebuchets were larger and could hurtle projectiles even farther than catapults. Then the counterweight is allowed to fall, rotating the lever arm and converting that potential into kinetic energy in the projectile, which is flung through the air. When the counterweight is raised up, it has lots of gravitational potential energy. A trebuchet has a lever arm with a large, heavy counterweight on one end and a smaller projectile on the other end. It relies on gravitational potential energy-the type of energy you get by raising something up off the ground. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.Ī trebuchet works differently. If you're enjoying this article, consider supporting our award-winning journalism by subscribing. This catapult worked by storing elastic potential energy-the type of energy you get from stretching something such as a rubber band or a spring-and rapidly converting it to kinetic energy (the energy of motion) of a projectile (in that case a cotton ball). The Bring Science Home activity Build a Catapult showed you how to build a miniature catapult out of popsicle sticks and rubber bands. But did you know about an even bigger type of medieval siege weapon called a trebuchet? Try this project to build a miniature version! In the Middle Ages armies would use them to hurl stones at castle walls.
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