 # Why Does A Satellite Accelerate?

## What is the acceleration of a satellite in orbit?

Thus, the acceleration of a satellite in circular motion about some central body is given by the following equation.

where G = 6.67 x 10-11 N m2/kg2, Mcentral = the mass of the central body about which the satellite orbits, and R = the average radius of orbit for the satellite..

## What force keeps a satellite in orbit?

Earth’s gravityEven when satellites are thousands of miles away, Earth’s gravity still tugs on them. Gravity–combined with the satellite’s momentum from its launch into space–cause the satellite go into orbit above Earth, instead of falling back down to the ground.

## What factors affect the size of the centripetal force?

Three factors which affect the centripetal force are:mass of the object;its speed;the radius of the circle.

## Can satellites see inside your house?

NOAA satellites have the capability to provide astounding views of the Earth. But many people want to know if these satellites can see their house, or even through their roofs and walls to the people inside. The answer is: no. Satellites differ greatly in the level of detail they can “see”.

## Which is the fastest satellite in the world?

B14: The Cubesat with One of the World’s Fastest Satellite RadiosEspecially notable is the high speed downlink 2 (HSD2)—the world’s fastest X-band low-Earth orbit (LEO) satellite radio that has achieved 1.7 Gbps downlink speed to date. … With HSD2, we can download about 1TB of data from a single satellite to a single ground station in a 24 hour period.More items…•

## What happens when a satellite speeds up?

If the satellite is moving too quickly then the gravitational attraction between the Earth and the satellite is too weak to keep it in orbit. If this is the case, the satellite will move off into space. This occurs at speeds around or above 11,200 metres per second (m/s).

## Is a satellite accelerating?

satellite is a projectile. Second, a satellite is acted upon by the force of gravity and this force does accelerate it towards the Earth. In the absence of gravity a satellite would move in a straight line path tangent to the Earth. … Indeed, a satellite is accelerating towards the Earth due to the force of gravity.

## What force causes the centripetal acceleration of a satellite in orbit?

Earth’s gravityAn orbiting satellite is close enough to be acted upon by Earth’s gravity. This force is constantly pulling the satellite in toward the center of the earth – it is a centripetal force and causes a centripetal acceleration. At this height, however, Earth’s gravity is only about 8.7 m/s2.

## How long can a satellite stay in orbit?

The satellites in the very low end of that range typically only stay up for a few weeks to a few months. They run into that friction and will basically melt, says McDowell. But at altitudes of 600 km—where the International Space Station orbits—satellites can stay up for decades.

## Do satellites crash into each other?

– Much like car crashes happen here on Earth, satellites – especially those operating in low-Earth orbit – have the potential of colliding with each other in space. With thousands of artificial satellites orbiting Earth, every now and then, the orbit of one satellite can cross the path of another.

## What is the maximum speed of satellite?

To maintain an orbit that is 22,223 miles (35,786 kilometers) above Earth, the satellite must orbit at a speed of about 7,000 mph (11,300 kph). That orbital speed and distance permit the satellite to make one revolution in 24 hours.

## Is speed of earth constant?

Thus the Earth travels about 107,000 kilometers per hour. … Earthâ€™s speed is not constant as the Earth orbits elliptical orbit. If the Earth is the closest to the Sun (perihelion), it moves the fastest. On the other hand when the Earth is the farthest from the Sun (aphelion), it moves the slowest.

## Why the satellite accelerates whereas it is moving at constant speed?

According to Newton’s Second Law, the satellite is accelerating because it experiences a net force acting on it, and also because its velocity is changing. The direction of the satellite’s acceleration is not tangential to the circular motion, but rather perpendicular to its velocity/towards the centre of the earth.

## How do you find the speed of a satellite?

Determine the orbital speed of this satellite. Use the information given below. The orbital speed can be found using v = SQRT(G*M/R). The R value (radius of orbit) is the earth’s radius plus the height above the earth – in this case, 6.59 x 106 m.

## Does satellite use fuel?

A satellite orbiting closer to the Earth requires more velocity to resist the stronger gravitational pull. Satellites do carry their own fuel supply, but unlike how a car uses gas, it is not needed to maintain speed for orbit. It is reserved for changing orbit or avoiding collision with debris.

## What two forces affect the level of an object’s acceleration?

Notice how mass and force affect acceleration. The acceleration of an object increases with increased force, decreases with increased mass, and is in the same direction as the force.

## How many dead satellites are in space?

3,000 deadWhile there are about 2,000 active satellites orbiting Earth at the moment, there are also 3,000 dead ones littering space. What’s more, there are around 34,000 pieces of space junk bigger than 10 centimetres in size and millions of smaller pieces that could nonetheless prove disastrous if they hit something else.

## Do satellites fall back to earth?

The short answer is that most satellites don’t come back to Earth at all. … Satellites are always falling towards the Earth, but never reaching it – that’s how they stay in orbit. They are meant to stay there, and usually there is no plan to bring them back to Earth.