Assertion: catapult | /r/CapableOf | use a lever arm
Facets:
value: to hurl a projectile
type: PURPOSE
Source sentences:
text: Catapults and trebuchets use a lever arm to hurl a projectile in an arcing ballistic trajectory toward their target, yet that simple mechanism is employed in many different manners on the battlefield.
text: Catapults and trebuchets use a lever arm to hurl a projectile in an arcing ballistic trajectory toward their target, yet that simple mechanism is employed in many different manners on the battlefield.