A spaceship is launched into a circular orbit close to earth's surface. What additional velocity has now to be imparted to the spaceship in the orbit to overcome the gravitational pull? (Take, radius of earth 
and 
)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
The orbital velocity of spaceship in circular orbit,
If spaceship is very close to earth surface, then 
radius of earth 
.
(Since, 
Here, 
and 
The escape velocity of spaceship,
Additional velocity required
Therefore, velocity of 
must be added to orbital velocity of spaceship to overcome the gravitational pull.
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