can anybody tell me how sattelite always stay up(its petrol operated like plane/what)?

Answer 1

Its plain physics dear. They use hydrogen based fuel to reach sufficient height and then start circling around. Once they are thrown in the circular orbit with sufficient speed, no fuel is needed as their own momentum keeps then in circle. It is combination of gravity & circular motion principles. Fuel is needed when some small course correction is required to maintain the orbit. If satelites requires large course correction, it is normally allowed to enter earth's atomosphere to burn rather than leaving it unattended.
Satelites in the near earth orbit (~300 to 900 km from earth) requires more correction compared to those in geo-sysnchronous orbit (~36000 Km from earth). That's why they are killed more quickly compared to geo synchronous ones.

In short, They need fuel for
1> Reaching orbit from earth
2> Getting thrown in the orbit with sufficient speed
3> Small course corrections
4> Re entry into earth atomosphere for burning

But, it is not required to stay in orbit. Also, solar power is used to power up appliances used onborad the staelites and not for its own movement. It is not enough even for small corrections.

Answer 2

This is a very simply method and once you unserstand it, you'll go oohhhhh right.

Okay imagine that you have a race track that has a slanted curved surface in a perfect circle. Now you have a boeling ball and you want to keep it on the track and off in the grass, let's say the grass represents earth and the track is space. SO let's go bowling. How hard must you roll the bowling ball on this track to keep gravity from making it roll into the grass?
Let's say it is required that the bowling ball travel at 15 miles per hour to stay on the track and not suffer from gravity. Now also remember that there is no friction in space. So once that ball is rolling at 15 MPH it's going to stay at 15. A satelite is put into an orbit that is lower or higher, faster or slower depending if you would like to scan the earth or to stay in one place like a weather satelite. So a satelite that looks down on lets say Missouri for the weather forecast is at a certain height in the sky spinning at the same speed as the earth held in place by gravity of all things. I hope this paints a mental picture that you can understand. I had the same questions for years. Once I knew the answer I understood it instantly. Good Luck

Answer 3

Satellites do not operate on fossil fuels but as i know they operate on rocket fuels. Man-Made Satellites always stay up because of the balance in the gravitational pull between the sun and the earth's gravity. There are several factors contributing to the fact that Man-Made Satellites always stay up. One of them is, as I said, Gravity. Another is its circular rotation.

Answer 4

The satellite's speed is what keeps it in orbit. Since there is virtually no drag, the satellite doesn't need any thrust to maintain its speed. The gravitational force required to hold an object in a circular orbit is given by mv^2/r. The gravitational force provided by the primary body is given by GmM/r^2. if we make these two equal, mv^2/r = GmM/r^2
v^2 = GM/r

Answer 5

Satellites stay in orbit using gravity. Orbits decay after time but, it is a long time normally. A orbit is a type of free fall that centered on circle instead of a straight line.

Answer 6

Satellites don't operate on these fossil fuels. They have large solar panels which gives them energy and with that they stay miles above us. Only when they are sent up by rockets, rockets consume fuels and after the rocket dtaches after reaching its destinaation the solar panels start working.

Answer 7

You are talking about space satellites ye? its basically out of earth's gravity field, so theres not enough gravity to pull it down to earth, but because its moving, it doesn't fly off into space. Hope that helped.