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

The moon's radius is $1/4$ that of the earth and its mass is $1/80$ times that of the earth. If $g$ represents the acceleration due to gravity on the surface of the earth,then the acceleration due to gravity on the surface of the moon is:

If $M$ is the mass of the Earth and $R$ is its radius,the ratio of the gravitational acceleration $g$ to the gravitational constant $G$ is:

If the Earth loses its gravity,then for a body:

As we move from the poles of the Earth towards the equator,what happens to the value of the acceleration due to gravity $(g)$?

If the radius of the earth contracts by $2\%$ and its mass remains the same,then the weight of a body at the earth's surface: