Chapter 10, GRAVITATION CBSE Board Class IX NCERT Solutions for Science Textbook Exercise Q.1: How does the force of gravitation between two objects change when the distance between them is reduced to half? Q.2: The gravitational force acts on all objects in proportion to their masses. Why, then, a heavy object does not fall faster than a light object? Q.3: What is the magnitude of the gravitational force between the earth and a 1 kg object on its surface? (Mass of the earth = 6 x 10 24 kg and radius of the earth is 6.4 x 10 6 m) Q.4: 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? Q.5: If the moon attracts the earth, why does the earth not move towards the moon? Q.6: What happens to the force between two objects, if (i) ...