Difference between revisions of "Template:Gr/doc"

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G is the [[gravitational constant]]. The template should be used in the following way:
 
G is the [[gravitational constant]]. The template should be used in the following way:
  
<nowiki>{{Gr|M|R|pre}}</nowiki>,
+
<nowiki>{{Gr|M|R|PRE}}</nowiki>,
  
where M is body's mass in 10<sup>21</sup>&nbsp;kg, R is radius in km and pre is the number of digits after decimal dot in the result. The result is expressed in m/s<sup>2</sup>.
+
where M is body's mass in 10<sup>21</sup>&nbsp;kg, R is radius in km and PRE is the number of digits after decimal dot in the result. The result is expressed in m/s<sup>2</sup>.
  
 
Example (escape velocity of [[Titania (moon)|Titania]]). M=3.526{{Esp|21}}&nbsp;kg. R=788.9&nbsp;km:
 
Example (escape velocity of [[Titania (moon)|Titania]]). M=3.526{{Esp|21}}&nbsp;kg. R=788.9&nbsp;km:

Revision as of 17:31, 28 June 2009

Usage

This template calculates surface gravity g of a spherical body of the mass M and radius R:

<math>v2=\frac{G*M}{R^2}</math>.

G is the gravitational constant. The template should be used in the following way:

{{Gr|M|R|PRE}},

where M is body's mass in 1021 kg, R is radius in km and PRE is the number of digits after decimal dot in the result. The result is expressed in m/s2.

Example (escape velocity of Titania). M=3.526 kg. R=788.9 km:

v2=0.378 m/s2.

See also