Question

The diagram given below shows the three kinds of levers. Name the class of lever and give one example of the class.

Answer 1

Class of Lever:

• In a Class 2 Lever, the load is positioned between the fulcrum and the effort.

Example of Class 2 Lever:

1. Wheelbarrow: The load is in the center, the wheel acts as the fulcrum, and effort is applied at the handles.
2. Nutcracker: The fulcrum is at the hinge, the load is the nut, and the effort is applied at the handles.
3. Bottle Opener: The fulcrum is the edge of the bottle cap, the load is the cap, and effort is applied by lifting the handle.

Key Features of Class 2 Lever:

• Always provides a mechanical advantage because the effort arm is always longer than the load arm.
• Reduces the effort needed to lift or move a heavy load.