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I've seen several video which claims that is anti-gravity. I am sure at least one of them, use a kind of electricity to lift an object! (triangle lifter), I would guess electricity lift that object by air. But what is the equation?, I have no idea.

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closed as not a real question by Waffle's Crazy Peanut, Qmechanic May 26 '13 at 9:30

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

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I don't think this is really answerable unless you provide a link to one of the videos you're referring to. –  Colin McFaul May 25 '13 at 21:03
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Related: physics.stackexchange.com/q/16474/2751 –  Dilaton May 25 '13 at 22:17
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Suggestion to the question (v3): Instead of 'anti-gravity', a better word to describe the videos is 'levitation'. Quoting Wikipedia: [Anti-gravity] does not refer to the lack of weight under gravity experienced in free fall or orbit, or to balancing the force of gravity with some other force, such as electromagnetism or aerodynamic lift. –  Qmechanic May 25 '13 at 22:35
    
The triangle lifter you're referring to works by ionizing air and forcing it downward, producing lift. The Mythbusters crew tested it in a vacuum and it didn't work, so it's clearly not anti-gravity. It's just a highly inefficient way of obtaining lift. –  jld May 25 '13 at 23:15
    
Gravity? Really, a force involved with (?:anti-)?gravity is gravity. You need to be more explicit with your question. –  Brandon Enright May 26 '13 at 1:56

2 Answers 2

That would be the electromagnetic force, which is governed by Maxwell's Equations. See here for the formulas.

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If anti-gravity is the absence of gravity contribution to the forces, then by definition no force is responsible of this absence. Either you go very far from any source of gravitational attraction, or you revolutionize modern physics.

If anti-gravity is a counter-acting force which cancels out gravity, then probably electromagnetic force, with the possible use of superconducting magnets. Most videos that claim anti-gravity will use something like that.

If anti-gravity is the effect of gravity on anti-matter, then nobody knows completely how this works.

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