the trebuchet was believed to have started in china around 300 bc
You're not looking hard enough. Trebuchet was a fairly popular seige machine of its time, so there's bound to be plenty of information. I'd start with wikipedia .
Trebuchet is catapult that uses weight to fire.
Trebuchet MS was created in 1996.
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The trebuchet was much like a catapult. It was replaced with the cannon, and later, firearms.
A trebuchet uses the force of gravity to propel its projectile. The counterweight falling creates kinetic energy, which is transferred to the arm of the trebuchet and then to the projectile, launching it forward. Additionally, the leverage provided by the long arm of the trebuchet amplifies this force.
As far as i know there are three: the basic catapult, trebuchet, and the floating arm trebuchet.
A trebuchet is defined as a machine used in medieval siege warfare for hurling large stones or other missiles. The first trebuchet was invented by the Chinese in the 4th century BC.
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The trebuchet was made in China, however, was used in Muslim and christain countries around the Mediterainean.