what uses magnets
How do the new roller coasters use magnets for breaks?
Do you think automobile breaks should be switched to magnets?
Magnetic brakes are made up of two rows of very strong Neodymium magnets. When a metal fin (usually made of aluminum) passes between the rows of magnets, eddy currents are generated in the fin, which creates a magnetic field opposing the fin’s motion. The resultant braking force is directly proportional to the speed at which the fin is moving through the brake element.
So the faster the roller coaster is moving, the more braking action occurs.
For an automobile, purely magnetic braking probably wouldn’t be a good idea, because you wouldn’t be able to stop fast when moving slowly. However magnetic braking is already in use for cars, in hybrid cars, when one puts on the brakes, the wheels turn a generator. A generator works by moving wires through a magnetic field. Moving the wires through a magnetic field generates electricity, the electricity generates an opposing magnetic field, which slows down the wheels while putting electricity back into the battery of the car.
Sneaky Uses – Magnet Magic
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