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Question

Differentiate between the three classes of levers. Give at least two examples of each class.


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Solution

  1. A lever is a rigid, straight, or bent bar that is capable of turning about a fixed axis.
  2. The following is a table showing the differences between the three kinds of levers.

Class-I lever

Class-II lever

Class-III lever

The position of the fulcrum is in between the load and effort.The position of load is in between the fulcrum and effort.The position of effort is in between the load and fulcrum.
Eg: Pliers, ScissorsEg: Bottle opener, NutcrackerEg: Sugar tong, Knife

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