Levers

• • First class
  • Second class
  • Third class


  The different classes of of levers
• • The fulcrum is positioned between the effort and the load
  • Examples of first-class levers include seesaws, crowbars, and scissors
  • In terms of mechanical advantage, a first-class lever can amplify force or distance, depending on the relative positions of the effort and the load

  First class levers
• • the load is positioned between the fulcrum and the effort
  • Examples of second-class levers include wheelbarrows, nutcrackers, and bottle openers
  • Second-class levers provide a mechanical advantage, allowing a smaller effort to lift a larger load, but they do not change the direction of the effort

  Second class lever
• • The effort is positioned between the fulcrum and the load
  • Examples of third-class levers include fishing rods, baseball bats, and tweezers
  • Third-class levers provide a mechanical disadvantage in terms of force, but they allow for greater speed or distance traveled by the load. They are often used for tasks requiring precision and speed rather than raw lifting power

  Third class lever