This video explains the science behind a trebuchet. The trebuchet is a medieval machine designed to throw objects at or into castles. This video explains that the gravitational potential energy stored in the raised counterweight is converted into kinetic energy in the projectile. Trebuchets make excellent science fair projects.
In this tutorial, we learn how to make a fast and easy tennis ball trebuchet. This tool will throw tennis balls easily so you can hit them without having a partner around. This only needs a few pieces of wood and 2x4's along with dumbbells. There isn't a whole lot to this, it's very simple to build. Use two 10 lb dumbbells clamped with a hose clamp onto the top of a 2x4. Use a dowel to go through this, so it will help it rotate. Down at the bottom is the release mechanism and on the sides wil...
Crush the Castle 2 is a trebuchet-based physics puzzler where the goal is to use the trebuchet to destroy the castles of your enemies. This video will walk you through each of the game's six world with all Golds.
Build your very own paper trebuchet. With this guide, you'll learn how to make a folded-paper catapult with origami, the traditional Japanese folk art of paper folding. For more information, including a step-by-step overview of the folding process, as well as to get started terrorizing your friends, family and coworkers with crumpled bits of paper, watch this free origami lesson.
When I'm showing off my HTC One, the first thing I do is unlock my device and say, "OK Google". It may earn me a weird look or two, but in the end people are amazed by the voice recognition and automation of the Google Now Launcher.
Sorry for the wait, but here are some pictures from the contests two and three weeks ago. Thanks to Justin:
Destroy the floating foam castle with a wee man projectile from a trebuchet. Or let the castle be defended with the rest of the guys while the catapult is destroying it with large amounts of cow pies
