Question

The period of a satellite moving very close to the surface of the earth of radius R is 84 minute. What will be the period of the same satellite, if is is taken at a distance of 3R from the surface of the earth ?
A. 84 min
B. `84xx4` min
C. `84xx8` min
D. `84 sqrt(8)` min

Answer 1

Correct Answer - C
`((T_(2))/(T_(1)))^(2)=((r_(2))/(r_(1)))^(3)=((4)/(1))^(3)=64 " " therefore T_(2) = 8T_(1)`