Question

why does the acceleration due to gravity decrease when a simple pendulum is taken to the mines?
as it is nearer to the core of the earth it should increase right?
please explain with a proper reason​

Answer 1

Answer:

As the depth increases the mass of the earth decreses. ... At the surface of the earth this value will be maximum because R will be max. When R becomes less ( i.e when depth increases) this value also decreases. Hence, acceleration due to gravity decreases with increase in depth.