ayan333 Posts: 1, Reputation: 1 New Member #1 Dec 11, 2007, 05:49 PM
Altitude above Earth's surface
At what altitude above Earth's surface would the gravitational acceleration be 4.4 m/s2?
Help.
 Capuchin Posts: 5,255, Reputation: 656 Uber Member #2 Dec 12, 2007, 02:11 AM
$F = ma$

$F = \frac{GMm}{r^2}$

equate the two to get:

$ma = \frac{GMm}{r^2}$

Cancel m to get

$a = \frac{GM}{r^2}$

here a is g (4.4m/s/s), G is the gravitational constant, M is the mass of the Earth and g is the distance from the center of mass of the Earth.

Should be easy from here.

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