Starting from the centre of the earth having radius $R$,the variation of $g$ (acceleration due to gravity) is shown by:

An astronaut on a strange planet finds that the acceleration due to gravity is twice that on the surface of the Earth. Which of the following could explain this?

The value of acceleration due to gravity at a height of $10 \,km$ from the surface of the Earth is $x$. At what depth inside the Earth is the value of the acceleration due to gravity the same value $x$ (in $\,km$)?

The mass of the moon is $7.34 \times 10^{22} \ kg$ and the radius of the moon is $1.74 \times 10^6 \ m$. The value of gravitational acceleration on the moon will be ....... $N/kg$.

$A$ body has weight $W$ newton at the surface of the earth. Its weight at a height equal to half the radius of the earth will be:

The height in terms of radius of the earth $(R)$,at which the acceleration due to gravity becomes $g/9$,where $g$ is acceleration due to gravity on earth's surface,is . . . . . . .