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Understanding Lever Mechanism: Types and Parts Explained

A lever is a simple machine that transfers force to move a load, providing a mechanical advantage. It consists of a beam pivoted at a fulcrum, with three types based on the locations of fulcrum, load, and effort. First-class levers have the fulcrum between effort and load like a see-saw, second-class levers position the load between effort and fulcrum, such as a wheelbarrow, and third-class levers place the effort between load and fulcrum, like tweezers or hammers.

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Understanding Lever Mechanism: Types and Parts Explained

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  1. Lever Mechanism

  2. What is a Lever? • A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum, used to transfer a force to a load and usually to provide a mechanical advantage. • A lever is a rigid body capable of rotating on a point on itself. On the basis of the locations of fulcrum, load, and effort, the lever is divided into three types.

  3. Parts of a Lever: • Fulcrum – the point at which the lever rotates. • Input force (also called the effort) – the force applied to the lever. • Output force (also called the load) – the force applied by the lever to move the load.

  4. Lever Mechanism:

  5. Types of Lever On the basis of the location of fulcrum ,load and effort ,the lever is divided into three parts • First- class Lever • Second -class Lever • Third-class Lever s,

  6. First-class levers: have the fulcrum between the effort (force) and the load to resemble a see -saw. Examples of first-class levers are pliers, scissors, a see-saw, and a weighing balance. Second –Class Lever: In second class levers, the load is between the effort (force) and the fulcrum A common example is a wheelbarrow where the effort moves a large distance to lift a heavy load, with the axle and wheel as the fulcrum.other examples are nutcracker,bottle opner and conventional door. Third –Class Lever: With third-class levers, the effort is between the load and the fulcrum.Examples: tweezers ,fishing rods ,hammers and barbecue tongs.

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