Question

The value of $g$ at the centre of earth is zero. What will be the weight of a body of mass $mkg$ at the centre of earth?

Answer 1

Weight of a body of mass $mkg$ is the force with which earth attracts it, which is given by the expression.
$W=m\times g$
where $g$ is the acceleration due to gravity
As at the centre of earth, $g=0$.
So,
$W=m\times 0$
$W=0$
Hence, weight of a body at the centre of earth will be zero.