Assertion: counterweight trebuchet | /r/CapableOf | use gravity
Facets:
Source sentences:
text: The counterweight trebuchet is a type of catapult that uses gravity.
text: Counterweight trebuchets use gravity; potential energy is stored by slowly raising an extremely heavy box (typically filled with stones, sand, or lead) attached to the shorter end of the beam (typically on a hinged connection), and releasing it on command.