Seesaw, for instance (5)
I believe the answer is:
lever
(Other definitions for lever that I've seen before include "Machine operator" , "Rigid bar pivoted about a fulcrum" , "Heavy bar" , "Means of exerting force" , "Purchase from bar" .)
I believe the answer is:
lever
(Other definitions for lever that I've seen before include "Machine operator" , "Rigid bar pivoted about a fulcrum" , "Heavy bar" , "Means of exerting force" , "Purchase from bar" .)