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Imagine an ancient machine that can hurl tens of kilograms of stone tens of meters without fuel or springs, relying solely on gravity. This machine is the trebuchet, one of the most efficient siege weapons ever invented. It works based on the principle of gravitational potential energy. A heavy weight, usually a large rock, is loaded onto one side of its arm. When the weight is dropped, the other arm quickly lifts, swinging the projectile bag and throwing its contents toward the target. This technique enabled trebuchets to launch boulders at speeds and distances that were staggering for their time.


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