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What is a lever?

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The lever is one of the most basic forms of a machine.

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They help us lift loads with lesser effort.

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Even though this looks simple, there are so many things going on in order to lift the object easily.

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A lever can be described as a long rigid body with a fulcrum along its length.

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Load

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The object you are lifting

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Fulcrum

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Point at which the lever pivots

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Effort

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The force applied to make the object move

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We use levers in so many of our day-to-day activities.

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They are classified into three categories depending on the relative position of the load, fulcrum and force.

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The first class lever where the pivot is in between the effort and the load.

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The second class lever where the load is between the fulcrum and the effort.

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The third class lever where the effort is between the fulcrum and the load.