6.A man weighs W on the surface of Earth. What is his weight at a height equal to R ?

7.Two satellite A and B, the ratio of their being 3 : 1, are in the circular orbits of radii r and 4r. The ratio at total mechanical energy of A to that of B is

8.The accentricity of Earth s orbit is 0.017. The ratio of the maximum speed in its orbit to its minimum speed is

9.The ratio of the kinetic energy required to be given to a satellite so that it escapes the gravitational field of Earth to the kinetic energy required to put the satellite in a circular orbit just above the free surface of Earth is

10.A satellite is revolving in an orbit close to the surface of Earth with kinetic energy K. When the kinetic energy is increased to nK, the satellite escapes. What is the minimum value of n ?