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Levitation. Maglev trains have no contacts with the rails while they move forward. They are levitated on the guide-way with the help of magnetic forces. Levitation is the process by which an object is suspended against gravity in a stable position without any physical contact.
The maglev trains are even faster than Japan's famous bullet trains, which currently travel at about 320km/h (200mph). They use magnetic levitation, hence the name, to float above the train tracks. This minimises the friction encountered by ordinary trains, and allows them to travel faster.