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

The value of G is —

1. 9.8 N m² kg^-2
2. 6.7 x 10^-11 N m² kg^-2
3. 6.7 x 10^-11 m s^-2
4. 6.7 N kg^-1

The gravitational force between two masses is :

1. directly proportional to the product of the masses
2. inversely proportional to the square of the separation between them
3. significant between heavenly bodies, but is insignificant between atomic bodies.
4. all of the above

The force of attraction between two masses each of 1 kg kept at a separation of 1 m is —

1. 9.8 N
2. 6.7 N
3. 980 N
4. 6.7 x 10^-11 N