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Sourav s Grade: 11
        
is the orbital velocity the minimum launching velocity for making the satellite revolve around the earth as definiton says ?If it is so the acc. 2 the eqn. , v0=R(g/R+h)^1/2 , if the destination orbit is higher, the the orbital velocity, ie the minimum launching velocity must be lower??HOW CAN IT BE SO??OR Is it like this ;As the satellite advances into more height, the velocity should decrease,(ie , it should be programmed accprdingly) so as to reach the fixed destination orbit which means that the orbital velocity is a variable??? PLZ EXPL
6 years ago

Answers : (1)

SAGAR SINGH - IIT DELHI
879 Points
										

Dear student,


Orbital Velocity is the velocity which is give to an artificial earth's satellite a few hundred kilometers above the earth's surface so that it may start revolving round the earth. It is denoted by Vo.


Expression for orbital velocity


Let, m = Mass of satellite


r = radius of circular orbit of satellite


h = height of satellite above surface of earth.


R = radius of earth


Vo = orbital velocity


M = Mass of the earth.


The



required by the satellite to keep moving in a circular orbit is produced by the gravitational force



between the satellite and the earth. Therefore,



Here r=R+h


Let gh be the acceleration due to gravity at heigh h


Therefore, weight of satellite = Mgh


Force of attraction between body (Satellite) and earth must be balance by weight of satellite.




Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.


All the best.


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Askiitians Expert


Sagar Singh


B.Tech, IIT Delhi


6 years ago
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