Assertion: catapult's power | /r/CapableOf | drop heavy loads of stone or lead
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text: The Trebuchet’s throwing arm, often engineered on site from a large tree trunk, harnessed the power of gravity dropping heavy loads of stone or lead which would in turn propel a large sling on the opposite end of the arm through a powerful arc, sending even bigger boulders over greater distances to torment the unfortunate target.