Gravitational Constant: Earth vs Other Planets

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Discussion Overview

The discussion revolves around the applicability of the gravitational constant, specifically whether it is limited to Earth or can be used in calculations involving other planets. The focus is on the distinction between the universal gravitational constant (G) and the acceleration due to gravity (g).

Discussion Character

  • Conceptual clarification, Technical explanation

Main Points Raised

  • Some participants clarify that G, the universal gravitational constant, is applicable in questions regarding all planets, as it is a fundamental constant in Newton's law of Universal Gravity.
  • Others note that small g, the acceleration due to gravity, is specific to the gravitational field near the Earth's surface and does not apply universally.
  • A participant expresses gratitude for the clarification regarding the use of G in calculations for different celestial bodies.
  • One participant emphasizes that G is referred to as the Universal Gravitational constant, suggesting its broad applicability.

Areas of Agreement / Disagreement

Participants generally agree that G can be used for all planets, while there is a distinction made regarding the applicability of small g, which is specific to Earth.

Contextual Notes

The discussion does not delve into the implications of using G in various contexts or the potential limitations of applying it to different planetary bodies.

Who May Find This Useful

This discussion may be useful for students or individuals interested in gravitational physics, particularly those exploring the concepts of gravitational constants and their applications in celestial mechanics.

Emz19
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Quick question... Can the gravitational constant only be used for Earth or can it be used in questions regarding other planets?
 
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Emz19 said:
Quick question... Can the gravitational constant only be used for Earth or can it be used in questions regarding other planets?
Are you talking about G, the constant that appears in Newton's law of Universal Gravity? If so, then yes, it applies generally.

On the other hand, small g, the acceleration due to gravity, only applies near the Earth's surface.
 
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Thanks a mil!
Ya I was talking about G in Newton's Law of Universal Gravity. So I can use G ( 6.67×10−11 N m2/ kg2 ) for all planets. Thank you for your help Doc
 

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