The value of 'g' at the center of the Earth is:

An iron ball and a wooden ball of the same radius are released from a beight $h$ in vacuum. The time taken by both to reach the ground is. The correct option is:

The height above surface of earth where the value of gravitational acceleration is the value of

gravitational acceleration is one fourth of that at surface, will be

The height of any point $P$ above the surface of earth is equal to diameter of earth. The value of acceleration due to gravity at point $P$ will be (Given $g =$ acceleration due to gravity at the surface of earth).

The geostationary orbit of the earth is at a distance of about $36000 \mathrm{~km}$ from the earth's surface. Find the weight of a $120-\mathrm{kg}$ equipment placed in a geostationary satellite. The radius of the earth is $6400 \mathrm{~km}$.

A body stretches a spring by a particular length at the earth's surface at equator. At what height above the south pole will it stretch the same spring by the same length? Assume the earth to be spherical.

Assertion: The value of acceleration due to gravity does not depend upon mass of the bodyReason: Acceleration due to gravity is a constant quantity

If the mass of two objects is doubled, and the distance between them is also doubled, the gravitational force between them will:

Acceleration due to gravity on the surface of a planet is $\frac{1}{6}{\rm{th}}$ that at the earth’s surface. Radius of that planet is $\frac{1}{3}{\rm{th}}$ that of the earth. Then ratio of mass of that planet and /mass of the earth is

At what height above the Earth's surface is the value of 'g' half of its value at the surface? (R = Radius of Earth)

Find the acceleration due to gravity of the moon at a point $1000 \mathrm{~km}$ above the moon's surface. The mass of the moon is $7.4 imes 10^{22} \mathrm{~kg}$ and its radius is $1740 \mathrm{~km}$.