Question: what are lever used for?
Answer: Levers can be used to exert a large force over a small distance at one end by exerting only a small force over a greater distance at the other. see-saw, bottle opener, etc. A lever (/ˈliːvər/ or US: /ˈlɛvər/) is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum.