A compound machine is a device that combines two or more simple machines to perform a specific task. Simple machines include tools like levers, pulleys, and inclined planes, which help make work easier by changing the direction or amount of force needed. By working together, these simple machines enhance efficiency and effectiveness in completing tasks. Examples of compound machines can be found in everyday life, such as a wheelbarrow, which uses a wheel (a simple machine) and a lever (the handles) to lift and transport heavy loads. Other examples include scissors and bicycles, which also rely on the combination of simple machines to function effectively.