Question

At the centre of the earth acceleration due to gravity is:

• A. zero
• B. Infinity
• C. 9.8
• D. 98

Answer 1

The correct option is A zero

gravitational field $g$ at distance $r$ where $r<R$( radius of earth) is

$g=\frac{G\rho r}{3}$ ($\rho$ is density of earth)

So at centre $r=0$

hence $g=0$

So at the centre of earth acceleration due to gravity is zero