Gravitational Constant: Earth vs Other Planets

Emz19 · Apr 11, 2014

Quick question... Can the gravitational constant only be used for Earth or can it be used in questions regarding other planets?

Doc Al · Apr 11, 2014

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.

Emz19 · Apr 11, 2014

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

SteamKing · Apr 11, 2014

That's why G is called the Universal Gravitational constant.

http://en.wikipedia.org/wiki/Gravitational_constant

Gravitational Constant: Earth vs Other Planets

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