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Book 21, Question 112 · Video

How Can a Train Float on Magnets?

Video · 1:52 · Crafty Clover explains, from A Million Whys Book 21

Imagine a train that floats just above its track, with no wheels touching at all. It is called a maglev train, and it really exists!

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What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. How can a train float on magnets?

The Big Idea

Imagine a train that floats just above its track, with no wheels touching at all. It is called a maglev train, and it really exists! Let's find out how magnets lift a whole train, and why it can go so fast.

Magnets in Train and Track

Step one: magnets in train and track. Magnetic levitation trains, called maglevs, use powerful magnets in the train and in the track. These magnets push or pull in clever ways.

Floating Up

Step two: floating up. The magnets lift the train a few inches above the track. They also move it forward along the way, so the train glides without an engine pulling it.

No Rubbing

Step three: no rubbing. With no wheels rubbing on rails, there is little friction. Some maglev trains in service reach over 250 miles per hour.

A Closer Look

Let's take a closer look! The train has powerful magnets. The track has magnets too. The train floats a few inches up. With no rubbing, it flies.

Quick Facts

Quick facts! A maglev train floats so smoothly that its ride feels quiet. Some trains reach over 250 miles per hour. No wheels rub on rails. Magnets lift and move the train.

Think Like a Scientist

Now, think like a scientist! Draw a train with wheels. Draw a maglev train without wheels. Mark every place where friction slows the wheeled train. Compare the two pictures. Keep asking why, and keep exploring!

Outro

Maglev trains float on magnets, so there is almost no friction to slow them down. Science is amazing! Keep wondering and keep exploring! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

Why I wrote this