Wheeled machines are devices that use wheels to facilitate movement and transportation. They can range from simple carts and bicycles to complex vehicles like cars and trucks. The wheels reduce friction with the ground, making it easier to move heavy loads or travel long distances. These machines are essential in various industries, including construction, agriculture, and logistics. For example, forklifts are wheeled machines used to lift and transport materials in warehouses, while tractors help in farming by pulling equipment across fields. Overall, wheeled machines play a crucial role in modern society by enhancing efficiency and productivity.