1. 
A satellite orbits at a height h above the Earth's surface. Let R be the Earth's radius. If V_{e} is the escape velocity and V_{o} is the orbital velocity of the satellite orbiting at a height h << R, then 




2. 
Two satellites of masses M_{1} and M_{2} have escape velocities V_{1} and V_{2} from the surface of a planet of radius R with acceleration due to gravity g. Which of the following is true? 




3. 
A planet is moving around the Sun in a circular orbit of circumference C. The work done on the planet by the gravitational force F of the Sun is 




4. 
The ratio of the time periods for two satellites of equal mass in circular orbits of radii R and 9 R is 




5. 
If the value of gravitational acceleration at a height h above the Earth's surface is the same as that at a depth d below the Earth's surface (with both h and d small compared to the Earth's radius R), then 



