Leverage /(lĕv"ẽr*ā̇j [or] lē"vẽr*ā̇j)/

Lev·er·age

Leverage

n.
  1. The action of a lever; mechanical advantage gained by the lever.

Phrases & Compounds

Leverage of a couple
the perpendicular distance between the lines of action of two forces which act in parallel and opposite directions.
Leverage of a force
the perpendicular distance from the line in which a force acts upon a body to a point about which the body may be supposed to turn.