The gravitational force between two bodies is —

1. always repulsive
2. always attractive
3. attractive only at large distances
4. repulsive only at large distances.

The gravitational force of attraction between two particles is because of:

1. their masses
2. their shapes
3. their sizes
4. none of these

The forces of attraction acting between two bodies is :

1. directly proportional to the product of their masses
2. directly proportional to the square of the distance between them
3. inversely proportional to the square of the distance between them
4. both (a) and (c)

The value of gravitational constant G depends on :

1. the nature of the particle
2. the temperature of the particle
3. medium
4. none of these