Question

variation of acceleration due to gravity With depth and altitude FULL DERIVATION ​

Answer 1

As you know,

F = GMm/d²

or

mg = GMm/ d²

g = GM/ d²

So g(acceleration due to gravity) is inversely proportional to the square of the distance i.e

As we keep on moving away from the centre of the earth g decreases and vice versa.

The value of g depends on the force of attraction of Earth towards on any object..if the object is moving away from earth acceleration due to gravity decreases..

but if we move beneath the depth if sea "g" increases upto very very small bit..which can be measured by special gravimeter only..

hope this helps u