A friction clutch is a mechanical device used to connect and disconnect two rotating shafts. It works by using friction between two surfaces, typically a clutch plate and a flywheel, to transmit power. When engaged, the clutch allows the engine's power to flow to the transmission, enabling the vehicle to move. When disengaged, it separates the engine from the transmission, allowing the driver to change gears without stalling the engine. Friction clutches are commonly found in vehicles, such as cars and motorcycles, as well as in various industrial machines. They come in different types, including single-plate clutches and multi-plate clutches, each designed for specific applications. Proper maintenance of friction clutches is essential for optimal performance and longevity.