Maglev Mission: Designing a Floating Train

Materials Needed

• 4–8 small ring magnets or ceramic magnets
• Wooden skewer, pencil, or smooth plastic straw
• Cardboard, craft sticks, or foam board for a track
• Tape, glue, scissors, ruler, and markers
• Small lightweight vehicle made from cardboard, a bottle cap, or a LEGO-style base
• Optional: two small wheels, paper clips, modeling clay, and a stopwatch
• Computer or tablet for a short maglev video or simulation
• Notebook or digital document for observations and data

Safety: Use magnets only with adult guidance. Keep strong magnets away from phones, computers, credit cards, pacemakers, and small children or pets. Do not put magnets near your mouth. Magnets can pinch fingers, so handle them carefully.

Learning Objectives

By the end of the lesson, the learner will be able to:

• Explain how magnetic attraction and repulsion work.
• Describe how magnetic levitation can reduce friction.
• Build and test a simple magnetic transportation model.
• Use measurements and observations to improve a design.
• Explain at least two benefits and two challenges of real maglev trains.

Success Criteria

A successful learner can:

• Correctly identify attracting and repelling magnetic poles.
• Use the terms magnetic field, levitation, friction, and propulsion accurately.
• Create a model that demonstrates magnetic repulsion or reduced friction.
• Record at least three test results and make one evidence-based improvement.
• Give a clear explanation of how the model connects to real maglev transportation.

Lesson Overview

Suggested time: 75–100 minutes

Big question: How can magnets help a train move quickly without touching the track?

Introduction: The Floating Train Challenge

Hook: Imagine traveling from one city to another at more than 300 miles per hour while the train appears to float above the track. There are no ordinary wheels rubbing against rails. How could that be possible?

Write down or discuss your first theory. Consider:

• What forces might hold up the train?
• How could the train move forward?
• What problems might engineers need to solve?

Share your ideas with a partner, family member, or instructor. Do not worry about being correct yet; your ideas will become testable predictions.

Key Vocabulary

• Magnetic field: The invisible region around a magnet where magnetic forces act.
• Attraction: A pulling force between objects, such as opposite magnetic poles.
• Repulsion: A pushing force between similar magnetic poles.
• Levitation: Floating or being held above a surface without ordinary physical support.
• Friction: A force that resists motion when surfaces rub or touch.
• Propulsion: The force that moves an object forward.

Body: Explore, Explain, and Build

Part 1 — I Do: Demonstrating Magnetic Forces

Place two magnets near each other. Slowly move them together, paying attention to how they feel.

1. Turn the magnets one way and bring them together.
2. Turn one magnet around and try again.
3. Describe whether the magnets pull together or push apart.
4. Mark the ends that repel each other with the same symbol.

Explain:

• Opposite poles attract.
• Like poles repel.
• The magnetic force can act without direct contact.
• The force becomes weaker as the magnets move farther apart.

Quick check: If two north poles face each other, will the magnets attract or repel? Explain why.

Part 2 — We Do: Testing Levitation

Work together with an adult, partner, or instructor to create a simple levitating arrangement.

1. Slide one ring magnet onto a pencil or skewer.
2. Slide a second ring magnet onto the same object with the same poles facing each other.
3. Notice how the second magnet may push away from the first.
4. Add another magnet if needed, keeping the poles aligned so the magnets repel.
5. Observe whether one magnet can remain separated from another without touching.

Record your observations:

Think-pair-share: Why does a levitating object tend to move sideways or flip instead of staying perfectly balanced? Discuss at least one way an engineer could guide or stabilize it.

Part 3 — I Do: How Real Maglev Trains Work

Real maglev systems use carefully arranged magnetic forces rather than a few loose magnets. Different designs may use magnets to perform three major jobs:

1. Lift: Magnets create an upward force that holds the train above the track.
2. Guide: Side magnets help keep the train centered.
3. Propel: A changing magnetic field pushes and pulls the train along the track, similar to an electric motor stretched out in a straight line.

Because the train does not roll on ordinary wheels at high speed, it can experience much less rolling friction. However, air resistance still affects it. Maglev systems also require expensive tracks, precise control systems, and large amounts of infrastructure.

Important idea: Maglev does not eliminate every force that slows a train. It mainly reduces contact friction between the train and track.

Part 4 — You Do: Build a Maglev-Inspired Model

Design challenge: Build a model vehicle that demonstrates magnetic repulsion, reduced friction, or magnetic guidance.

Choose One Design Path

• Path A: Floating vehicle — Use repelling magnets to create separation between a vehicle and its track.
• Path B: Low-friction vehicle — Use magnets to reduce contact between parts of the vehicle and track, then push the vehicle gently.
• Path C: Guided vehicle — Arrange magnets along the sides of a cardboard track to help keep the vehicle centered.

Build Steps

1. Sketch your track and vehicle before building.
2. Label where the magnets will be placed and which poles will face each other.
3. Attach the magnets securely with tape or glue. Do not glue until you have tested the arrangement.
4. Place the vehicle on the track and check whether it is stable.
5. Test the vehicle using the same starting position each time.
6. Record distance traveled, travel time, stability, and problems observed.
7. Change one feature, such as magnet spacing, vehicle weight, track width, or guide placement.
8. Test again and compare the results.

Testing Data Table

Engineering rule: Change only one major feature at a time. This makes it easier to decide which change affected the results.

Application Activity: Maglev Engineer Briefing

Imagine that a city is deciding whether to build a maglev line. Prepare a short briefing, written or spoken, that answers:

1. How does magnetic levitation reduce friction?
2. How would the train be lifted, guided, and propelled?
3. What are two benefits of maglev trains?
4. What are two challenges or costs?
5. Would you recommend building one in the city? Why or why not?

You may present your briefing as a paragraph, a labeled diagram, a slide deck, a recorded explanation, or a two-minute presentation.

Formative Assessment Checks

• Explain the difference between attraction and repulsion.
• Predict what will happen before each magnet test.
• Identify the force that reduces when a train leaves the rail: rolling friction, air resistance, gravity, or propulsion.
• Explain why a floating model might be unstable.
• Use your test data to identify the most effective design change.

Conclusion: Tell What You Learned

Return to the opening question: How can magnets help a train move quickly without touching the track?

Complete these sentence starters:

• Magnetic levitation works because...
• Like poles...
• A real maglev train needs magnets for...
• My model worked best when...
• One limitation of my model is...
• One question I still have is...

Exit Ticket

Answer the following without looking at your notes:

1. What happens when like magnetic poles face each other?
2. What type of friction does maglev mainly reduce?
3. What is one way real maglev trains move forward?
4. What evidence shows that your design improved or did not improve?

Summative Assessment Rubric

Differentiation and Extension

Support Options

• Use a prepared track and focus on testing rather than building every component.
• Provide a diagram showing where the same and opposite poles are located.
• Allow the learner to explain results verbally instead of writing a full report.
• Use a vocabulary word bank and sentence starters.
• Complete fewer trials but discuss each result carefully.

Extension Options

• Calculate average travel time across three trials.
• Graph distance or stability against magnet spacing.
• Research electromagnetic suspension and electromagnetic propulsion.
• Compare maglev trains with conventional high-speed trains, airplanes, or electric trains.
• Design a city maglev route and justify the stations, cost, environmental impact, and energy needs.
• Investigate why air resistance becomes a major issue at very high speeds.

Optional Follow-Up Challenge

Design a “next-generation” transportation system using magnets. Include a labeled diagram, a description of how it lifts and moves, one safety feature, one environmental benefit, and one engineering problem that still needs to be solved.