Why does satellite need no fuel to go around a planet in its fixed point?
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The fuel was already spent in launching the satellite into orbit; once there, the satellite retains its orbital velocity essentially “forever,” because of the total lack of friction in space.
Well, near-total, anyway. At the altitudes considered to be “low-Earth-orbits,” there IS still some wispy, incredibly thin traces of the atmosphere still left. It’s enough so that over months or years, the orbit can decay and, unless the satellite is reboosted back to its desired orbital velocity, it will eventually come down (and generally burn itself out on reentry).
Well, near-total, anyway. At the altitudes considered to be “low-Earth-orbits,” there IS still some wispy, incredibly thin traces of the atmosphere still left. It’s enough so that over months or years, the orbit can decay and, unless the satellite is reboosted back to its desired orbital velocity, it will eventually come down (and generally burn itself out on reentry).
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Initially to be put in an orbit around the planet , energy is required in the form of kinetic energy or speed of the satellite.
Once the satellite has sufficient speed, the central force (gravitational force) between the planet and the satellite (weight) acts on the satellite. The effect is that satellite changes direction continuously to move in a circular or elliptic orbit around the planet.
As there is no friction, there is no loss of energy. There is no radiation in this process.. Also the gravitational force is conservative
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Once the satellite has sufficient speed, the central force (gravitational force) between the planet and the satellite (weight) acts on the satellite. The effect is that satellite changes direction continuously to move in a circular or elliptic orbit around the planet.
As there is no friction, there is no loss of energy. There is no radiation in this process.. Also the gravitational force is conservative
if it helps you
so plz mark this in brain liest
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