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HETAV PATEL

Grade 11,

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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

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

Grade:11

1 Answers

SAGAR SINGH - IIT DELHI
878 Points
13 years ago

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

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