8.4: Magnets can levitate. Where is the energy from?
Description
This article is from the Scientific Skepticism FAQ, by Paul Johnson Paul@treetop.demon.co.uk with numerous contributions by others.
8.4: Magnets can levitate. Where is the energy from?
Levitating magnets do not require energy, any more than something
resting on a table requires energy. Energy is the capacity for doing
work. Work can be measured by force times distance. Although the
magnets are exerting a force the levitated object is stationary, so
the magnets aren't supplying any energy.
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