How to Use Magnets to Make Something Float

Magnets have the capacity to
••• Comstock/Comstock/Getty Images

Magnetism is a strange force. It is able to push and pull objects without touching them. It keeps the spinning Earth in line. And it's enjoyed a long stint as a popular science topic since its discovery more than 4,000 years ago. One of the many uses of magnetism is as an anti-gravitational flotation system. Using the correct number and placement of magnets, almost any object can be induced to float, seemingly weightless above the ground.

Bismuth Plates

Melt some bismuth, a magnetically charged lead alternative used in bird shot and fishing lures. This is the raw ingredient to make a "bismuth plate."

Each bismuth plate will repel a neodymium-iron-boron magnet. Attach enough neodymium-iron-boron magnets to the underside of an object and above enough bismuth plates, and you will have rudimentary flotation.

Polarized Magnets

Available in most hobby shops, dipolar magnets have two sides, a "north" and "south." When placed in opposition to one another (north against north, south against sorth), the magnets repel one another vigorously.

Attach a crowd of dipolar magnets to the underside of an object, all with the same side facing down toward a similar crowd of opposingly-placed magnets on the ground. The magnets will repel one another and create lift.

Magnetized Metal

Some metals, such as iron, can be magnetized enough to repel other magnets, sometimes forcibly. By laying down a sheet of magnetized iron and attaching repulsive magnets to the object you'd like to float, you'll create tension between the two materials that might (depending on the weight of your object) lead to flotation.

Suspended Flotation

Novelty items have made good use of this technique for quite some time, specifically as desk decorations. The concept is relatively simple, though tricky to execute.

Obtain a polar magnet (north/south) and place it flat on a surface. Create an opposing force using another polar magnet with the same side down.

By placing a third bipolar magnet between the two, you can use the force of gravity to keep it from attaching itself to the upper magnet. The repulsion effect of the lower magnet will keep it from falling.

Related Articles

How to Magnetize an Iron Rod
Magnetic Levitation Projects for Kids
Things to Do With Rare Earth Magnets
How to Make a Negative Charge Magnet
How to Make an Electric Motor Using a 9V Battery
How to Make a Homemade Magnetic Levitation
Science Projects on Electromagnetic Cranes
A Science Project on What Makes Magnets Repel
How to Explain Magnets to Kindergarteners
How to Turn Off the Magnetic Field of a Permanent Magnet
What Are Bar Magnets Used For?
What Types of Metal are Attracted to Magnets?
How to Make Objects Move with a Magnet
How to Make a Windmill for a School Project
Science Facts About Magnets for Kids
How to Make a Magnet Attract Change
What Materials Do Magnets Repel?
Quick & Easy Experiments With Magnets
How Do Magnets Work in Saltwater?
How to Build an Electromagnet