Identify which of the below is not a Class 3 lever.

The correct answer is Wheelbarrow.

Key Points

• A wheelbarrow is an illustration of a second-class lever since the load is positioned between the fulcrum and the effort, making it a second-class lever.
• Levers allow you to exert a lot of force over a small area on one end while exerting little force over a larger area on the other.
• The fulcrum and the applied force are at opposite ends in a wheelbarrow. In the center of these two is the weight.
• The load is situated in second-class levers halfway between the effort (force) and the fulcrum. 

Important Points

• Third Class Lever:
  • Levers with the weight at one end, the fulcrum at the other, and the force applied in the center.
  • The arrangement is shown as a weight-force-fulcrum. To move the weight a greater distance in this instance, we must exert more force. 

Additional Information

• ​Because the fulcrum and load are at opposite ends, tweezers are third-class levers.
• The hockey stick is an example of a third-class lever. The fulcrum of a hockey stick holding is the hand that holds the top end of the stick.
• Because the effort is shared by the load and pivot, a stapler is an example of a class three lever.