Understanding Levers and Their Mechanisms
Learn about levers, a type of simple machine, their components, types, and how they work. Discover first-class, second-class, and third-class levers with real-life examples.
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Presentation Transcript
Lever Mechanism
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.
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.
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,
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.
