The motion of an orbiting satellite can be described by the same motion characteristics as any object in circular motion. The velocity of the satellite would be directed tangent to the circle at every point along its path.
What is a satellite in physics?
A satellite is a moon, planet or machine that orbits a planet or star. For example, Earth is a satellite because it orbits the sun. Likewise, the moon is a satellite because it orbits Earth. Usually, the word “satellite” refers to a machine that is launched into space and moves around Earth or another body in space.
What is the formula of satellite?
As seen in the equation v = SQRT(G * Mcentral / R), the mass of the central body (earth) and the radius of the orbit affect orbital speed. The orbital radius is in turn dependent upon the height of the satellite above the earth. 2.
What force is acting on a satellite?
Acting on the satellite are two forces: gravity, pulling the satellite toward Earth, and this centrifugal force, pushing the satellite away.
What are the 4 types of satellites?
- Low Earth Orbit (LEO)
- Geosynchronous Earth Orbit (GEO)
- Medium Earth Orbit (MEO)
What are 3 uses of satellites?
- Earth Observation and Imagery. Satellites can provide an image of the surface of the Earth.
- Communication. Satellites can enable communication services on the ground.
What are the 2 main types of satellites?
There are two different types of satellites – natural and man-made. Examples of natural satellites are the Earth and Moon. The Earth rotates around the Sun and the Moon rotates around the Earth. A man-made satellite is a machine that is launched into space and orbits around a body in space.
What are the three types of satellite?
There are three types of satellites around the Earth: geostationary (GEO), medium Earth orbit (MEO), and low Earth orbit (LEO).
What are 5 things satellites are used for?
- Climate & environmental monitoring. Satellites are some of the best sources of data for climate change research.
- Land stewardship.
- Space science.
What is the velocity of satellite?
To stay in orbit, a satellite has to travel at a very high velocity, which depends on the height. So, typically, for a circular orbit at a height of 300 km above the Earth’s surface, a speed of 7.8 km/s (28,000 km/h) is needed. At this speed, the satellite will complete one orbit around the Earth in 90 minutes.
What is the energy of a satellite?
So, the energy required by a satellite to revolve around the earth is called its orbiting energy. Since this satellite revolves around the earth, it has kinetic energy and is in a gravitational field, so it has potential energy.
What is the acceleration of a satellite?
Objects inside an orbiting satellite appear to be weightless because they, and the satellite, are falling at the same rate (approximately 9.80 ms-2).
Do all satellites move at the same speed?
A: No, satellites that orbit at different altitudes have different speeds. Satellites that are further away actually travel slower. The International Space Station has a Low Earth Orbit, about 400 kilometers (250 miles) above the earth’s surface.
Why do satellites not fall?
Even 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 to go into orbit above Earth, instead of falling back down to the ground.
How does gravity work with satellites?
The idea behind a gravity assist is to use a planet’s motion to accelerate a satellite. For example, a satellite heads toward Jupiter — in the process, it accelerates because it is “falling toward” Jupiter. Then, it passes fairly close to the planet and starts speeding away from it.
What is the range of satellite?
Satellite communications use the very high-frequency range of 1–50 gigahertz (GHz; 1 gigahertz = 1,000,000,000 hertz) to transmit and receive signals. The frequency ranges or bands are identified by letters: (in order from low to high frequency) L-, S-, C-, X-, Ku-, Ka-, and V-bands.
What is the importance of satellite?
From space, they provide information and services to support global communications, the economy, security and defence, safety and emergency management, the environment and health. As technology advances, the potential of satellites will undoubtedly continue to grow.
What are the basic parts of a satellite?
Every usable artificial satellite — whether it’s a human or robotic one — has four main parts to it: a power system (which could be solar or nuclear, for example), a way to control its attitude, an antenna to transmit and receive information, and a payload to collect information (such as a camera or particle detector).
What was the first satellite?
On Oct. 4, 1957, Sputnik 1 successfully launched and entered Earth’s orbit. Thus, began the space age.
Who invented satellite?
Fifty years ago, on October 4, 1957, the Soviet Union launched Sputnik, the first man-made satellite, shocking the American public and beginning the Space Age. People had been dreaming of space travel for some time before the launch of Sputnik.
What is satellite explain?
A satellite is an object that moves around a larger object. Earth is a satellite because it moves around the sun. The moon is a satellite because it moves around Earth. Earth and the moon are called “natural” satellites. But usually when someone says “satellite,” they are talking about a “man-made” satellite.
How do satellites move in space?
A satellite maintains its orbit by balancing two factors: its velocity (the speed it takes to travel in a straight line) and the gravitational pull that Earth has on it. A satellite orbiting closer to the Earth requires more velocity to resist the stronger gravitational pull.
How many types of satellite orbits are there?
There are essentially three types of Earth orbits: high Earth orbit, medium Earth orbit, and low Earth orbit. Many weather and some communications satellites tend to have a high Earth orbit, farthest away from the surface.
What is the size of satellite?
Satellites vary in size. Some cube satellites are as small as 10 cm. Some communication satellites are about 7 m long and have solar panels that extend another 50 m. The largest artificial satellite is the International Space Station (ISS).
Are satellites stationary or moving?
Satellites in geostationary orbit (GEO) circle Earth above the equator from west to east following Earth’s rotation – taking 23 hours 56 minutes and 4 seconds – by travelling at exactly the same rate as Earth. This makes satellites in GEO appear to be ‘stationary’ over a fixed position.