NCERT Solutions for Chapter: Gravitation, Exercise 3: VSA

How is the gravitational force between two point masses affected when they are dipped in the water keeping the separation between them the same?

Is it possible for a body to have inertia but no weight?

We can shield a charge from electric fields by putting it inside a hollow conductor. Can we shield a body from the gravitational influence of nearby matter by putting it inside a hollow sphere or by some other means?

An astronaut inside a small spaceship orbiting around the earth cannot detect gravity. If the space station orbiting around the earth has a large size, can he hope to detect gravity?

The gravitational force between a hollow spherical shell (of radius $R$ and uniform density) and a point mass is $F$. Show the nature of $F$ versus $r$ graph where $r$ is the distance of the point from the centre of the hollow spherical shell of uniform density.

Out of aphelion and perihelion, where is the speed of the earth more and why?

What is the angle between the equatorial plane and the orbital plane of:

(a) Polar satellite?

What is the angle between the equatorial plane and the orbital plane of:

(b) Geostationary satellite?