Mechanical machines are devices that use mechanical power to perform work. They can convert energy from various sources, such as electricity or fuel, into motion. Common examples include cars, bicycles, and pumps. These machines often consist of moving parts that work together to achieve a specific task, making them essential in various industries. Mechanical machines can be simple, like a lever or pulley, or complex, like robots and industrial machinery. They help increase efficiency and productivity in tasks ranging from manufacturing to transportation. Understanding how these machines operate is crucial for advancements in technology and engineering.