6.When the body is moving up, the acceleration due to gravity will be:

7.Consider the earth to be a homogeneous sphere. Scientist A goes deep down in a mine an scientist B goes high up in a balloon. The gravitational field measured by:

8.A planet has twice the density of Earth but the acceleration due to gravity on the surface is same as on the surface of Earth. Its radius in terms of the radius R of Earth is

9.If the speed of a satellite moving around a planet is increased by 41.4% it will:

10.Two identical satellite are moving around the Earth in circular orbits at heights 3R and R respectively where R is the radius of the Earth. The ratio of their kinetic energies is