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February 1, 2015

February 1, 2015

Posted by **Annie** on Thursday, January 21, 2010 at 8:59pm.

You can calculate it using the Algebraic equation: gr = R2/r2 x g

R = the radius of the planet

r = the distance from the center of mass of the planet to the center of mass of the object in orbit

g = the gravitational attraction of the planet on objects on its surface

gr = the gravitational attraction of the planet as felt on the less massive object

The gravitational attraction of the Earth on the surface is 1g.

the Equatorial radius of the Earth in kilometers is 6378.1

- space -
**bobpursley**, Thursday, January 21, 2010 at 9:21pmyou are given to use:

gr= Re^2/(Re+ alt)^2 * g

is there any reason you can't do that?

of course, convert 220 miles to km

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