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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.
With maglev, as there really are no touching parts between the train and the rails, there is almost no (with the exception of air) friction, so it takes a lot less energy to move the train, and get it running at very high speeds. Hope all that helps, MLx! Second, to move the train uses a linear electro motor.