# Science

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What is the gravity at the height of 15000 km above the earth surface

• Science -

The Earth's radius is Re = 6357 km. A location 15,000 km above the surface would be
Re + 15,000 = 21,357 km
from the center.

Since the accleration of gravity, g, is proportional to 1/R^2, where R is the distance from the center of the earth, at that height

g = (6357/21,357)^2 * 9.8 m/s^2
= 0.87 m/s^2

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