- What is the gravitational field strength of a planet when the weight of a 100 kg astronaut is 400 N?

a) ¼ N kg^{-1 } b) 9.8 N kg^{-1} c) 4 N kg^{-1 } d) infinity

- The only natural satellite of the earth complete orbits in about

a) 24 days b) 27.3 days c) 30 days d) 365 1/4 days

- The satellite that revolves in a polar orbit is called

a) Natural Satellite b) Geostationary satellite c) Polar