Identify the complex machine shown, explain its function, list the simple machines it contains, and give two other examples of complex machines with their simple machines.

Here is the solution to the question about the complex machine:

a)

• The complex machine shown in the image is a stapler.
• Its use is to fasten sheets of paper together using metal staples.

b)
The simple machines present in a stapler and their roles are:

• Lever: The top part of the stapler that you press down on, and the base that bends the staple, both act as levers.
  • Role: To multiply the input force, allowing the staple to be driven through the paper and its ends to be bent.
• Wedge: The pointed ends of the staple itself.
  • Role: To pierce through the layers of paper.

c)
Two other examples of complex machines and the simple machines present in each are:

1. Complex Machine: Scissors

   • Lever: Each handle and blade combination acts as a lever, pivoting around the screw.
   • Wedge: The sharp cutting edges of the blades are wedges.
   • Screw: The pivot that holds the two halves of the scissors together.

2. Complex Machine: Wheelbarrow

   • Lever: The handles and the tray form a lever, with the wheel acting as the fulcrum, allowing a heavy load to be lifted and moved with less effort.
   • Wheel and Axle: The wheel and its axle allow the wheelbarrow to roll easily, reducing friction and making it easier to transport materials.