An eddy current brake, unlike electro-mechanical brakes, which apply mechanical pressure on two separate objects, slow an object by creating eddy currents through electromagnetic induction which create resistance, and in turn either heat or electricity. Magnetic brakes are silent and are much smoother than friction brakes, gradually increasing the braking power so that the people on the ride do not experience rapid changes in acceleration. Eddy current brakes are made from a large electrically conducting object moving through a stationary magnetic field. The magnet can be either a permanent magnet or an electromagnet. The movement can be either in a straight line or circular. When a metallic wheel passes between the rows of magnets, eddy currents are generated. Because of the tendency of eddy currents to oppose, eddy currents cause energy to be lost. More accurately, eddy currents transform more useful forms of energy, such as kinetic energy, into heat, which is generally much less useful. During braking, the metal wheels are exposed to a magnetic field from an electromagnet, generating eddy currents in the wheels. The magnetic interaction between the applied field and the eddy currents acts to slow the wheels down. The faster the wheels are spinning, the stronger the effect since large speed produces large change in flux and hence large amount of eddy current which is proportional to force , meaning that as the train slows the braking force is reduced, producing a smooth stopping motion. This very property, however, is also one of magnetic breaking’s disadvantages in that the eddy force itself can never completely stop a train in ideal condition.