What is the most important effect of the fact that there is no friction between maglev trains and the ground

Maglev is known as magnetic levitation. It's the scenario where a train uses magnetic for it's movement between it and the rail track

Explanation:

Maglev is known as magnetic levitation. It's the scenario where a train uses magnetic for it's movement between it and the rail track. One of the purpose of this is to help reduce friction. The magnets keeps the train afloat above the track, you'll notice the train looks suspended a little above the rail track.

They do require a high strength of electromagnetic force to keep the train suspended for the total movement. The train could run as much as 550 - 600mph

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explanation:

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