Gravitational constant - Revision history

Jmdonev: 1 revision imported

2017-08-29T01:47:37Z

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Jmdonev at 03:43, 27 August 2017

2017-08-27T03:43:55Z

← Older revision		Revision as of 03:43, 27 August 2017
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	[[Category:Done ~~2016~~-04-30]]		[[Category:Done 2017-07-01]]
	[[File:Cavendish_Torsion_Balance_Diagram.png\|300px\|thumb\|right\|Figure 1. A torsional balance used to measure the gravitational constant.<ref>Wikimedia Commons. (June 1, 2016). ''Torsional balance by Chris Burks (Chetvorno)'' Own workThis vector image was created with Inkscape., Public Domain, [Online]. Available: https://commons.wikimedia.org/w/index.php?curid=2660162</ref>]]		[[File:Cavendish_Torsion_Balance_Diagram.png\|300px\|thumb\|right\|Figure 1. A torsional balance used to measure the gravitational constant.<ref>Wikimedia Commons. (June 1, 2016). ''Torsional balance by Chris Burks (Chetvorno)'' Own workThis vector image was created with Inkscape., Public Domain, [Online]. Available: https://commons.wikimedia.org/w/index.php?curid=2660162</ref>]]
	<onlyinclude>The gravitational constant (G) is an experimentally calculated value that is involved in determining the [[gravitational force]] between two objects.</onlyinclude><ref name = A>E. Mazur, "Gravity," in ''Principles and Practice of Physics Volume 1''. Pearson, ch. 13, pp. 325</ref> Its primary use is outlined in the following equation:		<onlyinclude>The gravitational constant (G) is an experimentally calculated value that is involved in determining the [[gravitational force]] between two objects.</onlyinclude><ref name = A>E. Mazur, "Gravity," in ''Principles and Practice of Physics Volume 1''. Pearson, ch. 13, pp. 325</ref> Its primary use is outlined in the following equation:

	<m> F_{g} = G\frac{m_{1}m_{2}}{r^{2}} </m>		<center><math> F_{g} = G\frac{m_{1}m_{2}}{r^{2}} </math> </center>

	:::* <m>F_{g}</m> is the [[gravitational force]], measured in [[newton]]s		:* <math>F_{g}</math> is the [[gravitational force]], measured in [[newton]]s
	:::* <m>G</m> is the gravitational constant		:* <math>G</math> is the gravitational constant
	:::* <m>m_{1}</m> and <m>m_{2}</m> are the [[mass]]es of both objects, measured in ~~kilograms~~		:* <math>m_{1}</math> and <math>m_{2}</math> are the [[mass]]es of both objects, measured in [[kilogram]]s
	:::* <m>r</m> is the distance between the objects, measured in [[meter]]s		:* <math>r</math> is the distance between the objects, measured in [[meter]]s

	The gravitational constant is therefore a proportionality constant between the gravitational force and the result of the product of the masses of two objects divided by the square of the distance between them. This is an example of an [[inverse square law]]. Historically, this constant was first measured using a torsional balance as seen in figure 1.		The gravitational constant is therefore a proportionality constant between the gravitational force and the result of the product of the masses of two objects divided by the square of the distance between them. This is an example of an [[inverse square law]]. Historically, this constant was first measured using a torsional balance as seen in figure 1.

Jmdonev: 1 revision imported: From the summer

2016-09-17T22:29:20Z

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Jmdonev at 19:01, 1 June 2016

2016-06-01T19:01:25Z

← Older revision		Revision as of 19:01, 1 June 2016
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	[[Category:Done ~~2015~~-06-01]]		[[Category:Done 2016-04-30]]
			[[File:Cavendish_Torsion_Balance_Diagram.png\|300px\|thumb\|right\|Figure 1. A torsional balance used to measure the gravitational constant.<ref>Wikimedia Commons. (June 1, 2016). ''Torsional balance by Chris Burks (Chetvorno)'' Own workThis vector image was created with Inkscape., Public Domain, [Online]. Available: https://commons.wikimedia.org/w/index.php?curid=2660162</ref>]]
	<onlyinclude>The gravitational constant (G) is an experimentally calculated value that is involved in determining the [[gravitational force]] between two objects.</onlyinclude><ref name = A>E. Mazur, "Gravity," in ''Principles and Practice of Physics Volume 1''. Pearson, ch. 13, pp. 325</ref> Its primary use is outlined in the following equation:		<onlyinclude>The gravitational constant (G) is an experimentally calculated value that is involved in determining the [[gravitational force]] between two objects.</onlyinclude><ref name = A>E. Mazur, "Gravity," in ''Principles and Practice of Physics Volume 1''. Pearson, ch. 13, pp. 325</ref> Its primary use is outlined in the following equation:

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	:::* <m>r</m> is the distance between the objects, measured in [[meter]]s		:::* <m>r</m> is the distance between the objects, measured in [[meter]]s

	The gravitational constant is therefore a proportionality constant between the gravitational force and the result of the product of the masses of two objects divided by the square of the distance between them. This is an example of an [[inverse square law]].		The gravitational constant is therefore a proportionality constant between the gravitational force and the result of the product of the masses of two objects divided by the square of the distance between them. This is an example of an [[inverse square law]]. Historically, this constant was first measured using a torsional balance as seen in figure 1.

	For more about how the gravitational constant was found please see [http://www.physicscentral.com/explore/action/bigg.cfm Physics Central].		For more about how the gravitational constant was found please see [http://www.physicscentral.com/explore/action/bigg.cfm Physics Central] or this Scientific American article [http://www.scientificamerican.com/article/puzzling-measurement-of-big-g-gravitational-constant-ignites-debate-slide-show/ on the Puzzling measurement of the Big - G gravitational constant].

			==Phet: Gravitational force==
			The [http://phet.colorado.edu/ University of Colorado] has graciously allowed us to use the following Phet simulation. To get a physical intuition about how the law of gravity works, please explore the simulation below. Notice that even the biggest gravitational force below is still quite small compared to how much a person weighs (about 500-1000 N).

			<html><iframe src="http://phet.colorado.edu/sims/html/gravity-force-lab/latest/gravity-force-lab_en.html
			" width="800" height="600"></iframe></html>

			<html>
			<iframe width="816" height="459" src="//www.youtube.com/embed/yhG_ArxmwRM" frameborder="0" allowfullscreen></iframe>
			</html>

	==References==		==References==
	{{Reflist}}		{{Reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]

J.williams: 1 revision imported

2015-08-26T21:31:09Z

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J.williams at 16:54, 12 August 2015

2015-08-12T16:54:38Z

New page

[[Category:Done 2015-06-01]]
<onlyinclude>The gravitational constant (G) is an experimentally calculated value that is involved in determining the [[gravitational force]] between two objects.</onlyinclude><ref name = A>E. Mazur, "Gravity," in ''Principles and Practice of Physics Volume 1''. Pearson, ch. 13, pp. 325</ref> Its primary use is outlined in the following equation:

<m> F_{g} = G\frac{m_{1}m_{2}}{r^{2}} </m>

:::* <m>F_{g}</m> is the [[gravitational force]], measured in [[newton]]s
:::* <m>G</m> is the gravitational constant
:::* <m>m_{1}</m> and <m>m_{2}</m> are the [[mass]]es of both objects, measured in kilograms
:::* <m>r</m> is the distance between the objects, measured in [[meter]]s

The gravitational constant is therefore a proportionality constant between the gravitational force and the result of the product of the masses of two objects divided by the square of the distance between them. This is an example of an [[inverse square law]].

For more about how the gravitational constant was found please see [http://www.physicscentral.com/explore/action/bigg.cfm Physics Central].

==References==
{{Reflist}}
[[Category:Uploaded]]