... greater the fl ow of water, the greater the speed of rotation of the water wheel; if the speed of the water wheel is held constant, the greater fl ow accomplishes greater amounts of work. Figure ... resembles a water wheel turned by a stream of fl owing water; the falling water impinging on the paddles or vanes of the wheel imparts its energy to the wheel causing it to rotate and do work. The ... discontinued, the heat contained in the large masses of metal will take time to dissipate, allowing the various parts to cool slowly. The heavy mass supported by the shaft will, however, cause...