Equivalence principle - Revision history

FredericBernard: Changed category to relativity

2017-04-07T13:53:53Z

Changed category to relativity

: Fixed links

2016-09-10T15:24:24Z

Fixed links

DavidB4-bot: /* top */clean up & uniformity

2016-07-13T12:04:28Z

top: clean up & uniformity

PatrickD: Rewrite, put in historical context -- Newton, Soldner, Einstein.

2009-11-15T03:54:24Z

Rewrite, put in historical context -- Newton, Soldner, Einstein.

JacobI: rewikify

2009-09-12T04:05:06Z

rewikify

RSchlafly: is the Newtonian idea

2009-09-11T00:37:01Z

is the Newtonian idea

JonathanG: dead-end fix

2009-06-27T16:18:15Z

dead-end fix

Economist at 21:44, May 20, 2009

2009-05-20T21:44:15Z

Economist at 21:43, May 20, 2009

2009-05-20T21:43:51Z

PhyllisS at 21:36, May 20, 2009

2009-05-20T21:36:50Z

← Older revision		Revision as of 13:53, April 7, 2017
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	This principle was first enunciated by [[Albert Einstein]] as the starting point for the [[general theory of relativity]]. He formulated [[gravity]] as a special kind of fictitious force, arising from the curvature of [[spacetime]]. But the idea of fictitious forces was known in classical [[Isaac Newton\|Newtonian]] mechanics, and the very similar nature of gravity had been noticed before, for example, by Johann Soldner in 1803.		This principle was first enunciated by [[Albert Einstein]] as the starting point for the [[general theory of relativity]]. He formulated [[gravity]] as a special kind of fictitious force, arising from the curvature of [[spacetime]]. But the idea of fictitious forces was known in classical [[Isaac Newton\|Newtonian]] mechanics, and the very similar nature of gravity had been noticed before, for example, by Johann Soldner in 1803.

−	[[Category:~~Physics~~]]	+	[[Category:Relativity]]

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-The '''equivalence principle''' is the idea that gravity is just a [[fictitious force]], equivalent to other fictitious forces such as centrifugal force or the Coriolis force.  That is, the force felt by someone standing in the Earth's gravitational field is the same as the pseudo-force felt by someone in, say, an elevator in outer space being pulled by a rope attached to a spaceship accelerating at 9.8 ms<sup>−2</sup>.
+The '''equivalence principle''' is the idea that gravity is just a fictitious force, equivalent to other fictitious forces such as centrifugal force or the [[Coriolis effect|Coriolis force]].  That is, the force felt by someone standing in the Earth's gravitational field is the same as the pseudo-force felt by someone in, say, an elevator in outer space being pulled by a rope attached to a spaceship accelerating at 9.8 m s<sup>−2</sup>.
-This principle was first enunciated by [[Albert Einstein]] as the starting point for the [[general theory of relativity]].  He formulated gravity as a special kind of fictitious force, arising from the curvature of spacetime.  But the idea of fictitious forces was known in classical [[Isaac Newton|Newtonian]] mechanics, and the very similar nature of gravity had been noticed before, for example, by Johann Soldner in 1803.
+This principle was first enunciated by [[Albert Einstein]] as the starting point for the [[general theory of relativity]].  He formulated [[gravity]] as a special kind of fictitious force, arising from the curvature of [[spacetime]].  But the idea of fictitious forces was known in classical [[Isaac Newton|Newtonian]] mechanics, and the very similar nature of gravity had been noticed before, for example, by Johann Soldner in 1803.
 [[Category:Physics]]

@@ Line 1: / Line 1: @@
-The '''equivalence principle''' is the idea that gravity is just a [[fictitious force]], equivalent to other fictitious forces such as centrifugal force or the Coriolis force.  That is, the force felt by someone standing in the Earth's gravitational field is the same as the pseudo-force felt by someone in, say, an elevator in outer space being pulled by a rope attached to a spaceship accelerating at 9.8 ms<sup>-2</sup>.
+The '''equivalence principle''' is the idea that gravity is just a [[fictitious force]], equivalent to other fictitious forces such as centrifugal force or the Coriolis force.  That is, the force felt by someone standing in the Earth's gravitational field is the same as the pseudo-force felt by someone in, say, an elevator in outer space being pulled by a rope attached to a spaceship accelerating at 9.8 ms<sup>−2</sup>.
 This principle was first enunciated by [[Albert Einstein]] as the starting point for the [[general theory of relativity]].  He formulated gravity as a special kind of fictitious force, arising from the curvature of spacetime.  But the idea of fictitious forces was known in classical [[Isaac Newton|Newtonian]] mechanics, and the very similar nature of gravity had been noticed before, for example, by Johann Soldner in 1803.
 [[Category:Physics]]

@@ Line 1: / Line 1: @@
-The '''equivalence principle''' is the [[Isaac Newton|Newtonian]] idea that states the force felt by someone standing in a gravitational field is the same as the pseudo-force felt by someone in an accelerating reference frame.
+The '''equivalence principle''' is the idea that gravity is just a [[fictitious force]], equivalent to other fictitious forces such as centrifugal force or the Coriolis force.  That is, the force felt by someone standing in the Earth's gravitational field is the same as the pseudo-force felt by someone in, say, an elevator in outer space being pulled by a rope attached to a spaceship accelerating at 9.8 ms<sup>-2</sup>.
-More simply put, it attempts to say that being on Earth and experiencing [[gravity]] is equivalent to being in a spaceship accelerating upwards at 9.8 ms<sup>-2</sup> (g).
+This principle was first enunciated by [[Albert Einstein]] as the starting point for the [[general theory of relativity]].  He formulated gravity as a special kind of fictitious force, arising from the curvature of spacetime.  But the idea of fictitious forces was known in classical [[Isaac Newton|Newtonian]] mechanics, and the very similar nature of gravity had been noticed before, for example, by Johann Soldner in 1803.
 [[Category:Physics]]

@@ Line 1: / Line 1: @@
-The '''equivalence principle''' is the Newtonian idea that states the force felt by someone standing in a gravitational field is the same as the pseudo-force felt by someone in an accelerating reference frame.
+The '''equivalence principle''' is the [[Isaac Newton|Newtonian]] idea that states the force felt by someone standing in a gravitational field is the same as the pseudo-force felt by someone in an accelerating reference frame.
-More simply put, it attempts to say that being on Earth and experiencing gravity is equivalent to being in a spaceship accelerating upwards at 9.8 ms<sup>-2</sup> (g).
+More simply put, it attempts to say that being on Earth and experiencing [[gravity]] is equivalent to being in a spaceship accelerating upwards at 9.8 ms<sup>-2</sup> (g).
 [[Category:Physics]]

@@ Line 1: / Line 1: @@
 The equivalence principle is a theory proposed by Einstein, that states the force felt by someone standing in a gravitational field is the same as the pseudo-force felt by someone in an accelerating reference frame.
-More simply put, it attempts to say that being on Earth and experiencing gravity is equivalent to being in a spaceship accelerating upwards at 9.8 m/s^2 (g).
+More simply put, it attempts to say that being on Earth and experiencing gravity is equivalent to being in a spaceship accelerating upwards at 9.8 ms<small>-2</small> (g).
 [[Category:Physics]]