A friction clutch is a mechanical device used to connect and disconnect two rotating shafts. It operates 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. Friction clutches are commonly found in vehicles, such as cars and motorcycles, where they facilitate smooth gear changes. They can be operated manually or automatically, depending on the design. Proper maintenance is essential to ensure their longevity and performance in applications involving automotive and industrial machinery.