If suddenly the gravitational force of attraction between the earth and a satellite revolving around it becomes zero. What will happen to the satellite?

What do we call the gravitational force between the earth and an object?

What is the magnitude of the gravitational force between the earth and a 1 kg object on its surface? (Mass of the earth is 6 x 10^24 kg and radius of the earth 6.4 x 10^6 m.)

Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth.

The gravitational force between two objects of small masses on the surface of the earth can be neglected. Why?

Two artificial satellites, one close to the surface and other away are revolving around the earth. Which of them has larger speed?

The earth and the moon are attracted to each other by gravitational force. Does the earth attract the moon with a force that is greater or smaller or the same as the force with which the moon attracts the earth? Why?

If the earth suddenly shirnks, what will happen to the length of the day?

What is the work done by the force of gravity on a satellite moving round the earth? Justify your answer.

What is the source of centripetal force, when an electron revolves around the nucleus?