Question

how does the value of G change with the altitude above the surface of the earth ??

Answer 1

Gravity changes with altitude. as we know The gravitational force is proportional to 1/R2, where R is your distance from the center of the Earth.

eg. The radius of the Earth at the equator is 6400 kilometers.

Let's say you were in a jet at the equator that was 40 kilometers high above the earth's surface.

may be helpfull

Answer 2

The acceleration due to gravity at point A on the surface of the Earth is, The acceleration due to gravity at B is, Dividing eqn (1) by (2), we get, The value of acceleration due to gravity decreases with increase in height above the surface of the Earth.
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