1. 
The ratio of the time periods for two satellites of equal mass in circular orbits of radii R and 16 R is 




2. 
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 




3. 
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 




4. 
If the radius of the Earth were increased by a factor of 2 and its mass remained the same, then the acceleration due to gravity on the Earth would 




5. 
If the distance between two masses is increased by a factor of 5, the gravitational force of attraction between them will 



