Question

explain why the value of gravitation is zero at the centre of the earth ​

Answer 1

acceleration due to gravity varies directly proportional to distance from center, i.e. r

But varies

r

2

1

when r>R

expression is given by g=

r

2

GM

if r>R.

and g=

R

3

GMr

if r

so when r=0 then g will be zero.