A trebuchet (French trébuchet), also sometimes called a trebucke, is a type of catapult, a common and powerful type of siege engine which uses a swinging arm to throw a projectile. The traction trebuchet, also referred to as a mangonel at times, first appeared in Ancient China during the 4th century BC as a siege weapon.
Catapult physics is basically the use of stored energy to hurl a projectile (the payload), without the use of an explosive. The three primary energy storage mechanisms are tension, torsion, and gravity. The catapult has proven to be a very effective weapon during ancient times, capable of inflicting great damage. The main types of catapults used were the trebuchet, mangonel, onager, and ballista. Catapults have been integral to siege warfare since antiquity. Though ancient Catapults were one of the most effective weapons in siege warfare. Various types of Catapults have been used by the Greeks, Romans, and Chinese.