11.If the radius of earth decreases by 10%, the mass remaining unchanged, what will happen to the acceleration due to gravity?

12.Average density of the earth:

13.In the above question, if the satellite is stopped suddenly in its orbit and allowed to fall freely onto the earth, the speed with which it hits the surface of the earth is: (Assume g = 10 m/second square and R = 6400 km)

14.If the distance between the two particles is increased by 2%, then the force of attraction between them will:

15.How the gravitational constant will change if a brass plate is introduced between two bodies?