gravity formula

[boobesque]

Hey guys,

I have found 2 differing formulae for gravity with various sources for each. Which is the correct one please and are they actually 2 valid formula for 2 different things?

the 2 formulae are:

http://www.esci.keele.ac.uk/geophysics/assets/ images/formula.gif
http://zebu.uoregon.edu/~soper/Orbits/gravity. gif

as you can see there is a dispute as to whether the G is divided by r^2

Thanks

[Buenchico]

Er, they're the same formula!

The Keele formula is just expressed in a factorised version, (i.e. by 'taking out' G as a factor), on the Oregon site.

Chris

[TCL-MUMPING]

They are in fact the same, 5 x (2/3) is the same as (5 x 2)/3

[factor-fiction]

Yes, your question had me stumped too because both formulae are in fact the same and both include r� in the denominator

[boobesque]

mmhmm. Back to school for me

[kitesurfer]

hey man i got a 1st in engineering and it confused me :)