**Real life examples of complex machines that make use of simple machines:**

| Simple Machine | Complex Machine | Example |
|---|---|---|
| Lever | Car Jack | A car jack uses a lever to lift the weight of a car. |
| Wheel and Axle | Bicycle | A bicycle uses wheels and axles to propel the rider forward. |
| Pulley | Elevator | An elevator uses a system of pulleys to lift and lower people and goods. |
| Inclined Plane | Staircase | A staircase is an inclined plane that allows people to move between different levels. |
| Wedge | Knife | A knife uses a wedge to cut through food and other materials. |
| Screw | Corkscrew | A corkscrew uses a screw to remove corks from wine bottles. |

Here is a more detailed explanation of each example:

* **Car jack:** A car jack is a lever that is used to lift the weight of a car. The lever is placed under the car, and force is applied to the long end of the lever. This force is amplified and transmitted to the car, lifting it up.
* **Bicycle:** A bicycle is a complex machine that uses a variety of simple machines, including wheels, axles, gears, and levers. The wheels and axles allow the bicycle to move forward, while the gears and levers allow the rider to pedal and control the bicycle.
* **Elevator:** An elevator is a complex machine that uses a system of pulleys to lift and lower people and goods. The pulleys are attached to a cable, which is wrapped around a drum. When the drum is rotated, the cable pulls the elevator car up or down.
* **Staircase:** A staircase is an inclined plane that allows people to move between different levels. The inclined plane reduces the amount of force required to move the person up or down.
* **Knife:** A knife is a wedge that is used to cut through food and other materials. The wedge shape of the blade concentrates the force applied to it, allowing it to cut through the material.
* **Corkscrew:** A corkscrew is a screw that is used to remove corks from wine bottles. The screw is inserted into the cork and then rotated. As the screw rotates, it moves into the cork, pulling it out.

These are just a few examples of how simple machines are used in complex machines. Simple machines are essential to many of the technologies that we rely on every day.
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