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What is the work done by the field of a nucleus in a complete circular orbit of the electron. what if the orbit is elliptical?
In a complete circular orbit of an electron around a nucleus, the work done by the field of the nucleus is zero. This is because the force is always perpendicular to the direction of motion, so there is no displacement along the direction of the force, resulting in no work done. If the orbit is elliptical, there would be work done by the field of the nucleus due to the non-zero component of the force parallel to the direction of motion during the orbital motion.
What is the work done by an electron revolving in a circular orbit of rdius r around the nucleus?
Here a centripetal force provided by electrostatic force of attraction acts on the electron towards the centre of orbit but motion is along the tangent to the circular orbit at ecah point. As force and displacement are in mutually perpendicular directions at each point, the work done is zero. E V SHAKKEER HUSSAIN
When a particle is moving in a circular motion what is the work done by it?
When a particle is moving in a circular motion at a constant speed, the work done by the particle is zero. This is because work is defined as force applied over a distance in the direction of the force, and in circular motion, the force and displacement are perpendicular to each other, resulting in no work being done.
Give an example of an object that 1 moves and 2 has a force exerted on it but no work is performed on the object?
A body in a circular orbit around the earth or sun is moving. There is a gravitational force attracting it towards the central body, but gravity does no work on it. Since the orbit is circular, the object never moves toward the central body, so the force of gravity never moves it through a distance in the direction of the force.
What is the work done by a body moving along a circular path?
The work done by a body moving along a circular path is zero if the force is perpendicular to the direction of motion, such as in the case of centripetal force. This is because the displacement is perpendicular to the force. If there is a component of the force in the direction of the motion, work is done, calculated as the dot product of the force and displacement vectors.
What does the work-energy theorem say about the speed of a satellite in circular orbit?
Not very much, I would say. There is no work being done in this situation so there's no change in kinetic energy. So the satellite's speed remains constant. But we already knew the speed was constant. Perhaps I'm missing something.
Does earth's gravity do any work on satellite revolving around it?
NO. The gravity of Earth, in conjunction with the inertia of the satellite, keeps the satellite revolving around Earth. However, the satellite doesn't get any nearer to the Earth. So, according to the laws of physics, no work is done. (I'm ignoring the fact that satellites sometimes lose height and need to be "boosted" a bit to maintain their orbits. Also, I'm assuming that the satellite's orbit is circular. If the orbit is elliptical the answer is more or less the same, but a bit more complicated.)
Is the work is done when satellite orbits around the earth?
No because it stays in orbit and takes pictures of the ever changing earth.
What keeps a satellite in orbit around a planet?
It is not gravity because there is no gravity in space, only some on certain planets, deffiantly on earth. It is done by the strength from other planets the sun for instance. Heat waves. Some of the gravity in space does help keep the planets and satellites in orbit.
What is geostationary satellite?
A satellites period, the time it takes it to go around the earth, is determined, in part, by its altitude. The further away it is then the longer it will take. You can calculate an altitude where it will take just one day to make an orbit. If this is done then though the satellite orbits the earth it appears to be stationary above one point of the earth. This orbit must be above, or very near to, the equator. For the earth this altitude is approximately 36,000 km (22,000 miles)
What is a geostation satellite?
Geostationary satellites orbit high above the surface of the earth at about 35,000km, directly above the equator. The take the same time to complete one orbit as the earths surface as it rotates meaning it is always above the same point on earth. They are used for TV and telephone signals as well as weather imagery, among other things. A satellites period, the time it takes it to go around the earth, is determined, in part, by its altitude. The further away it is then the longer it will take. You can calculate an altitude where it will take just one day to make an orbit. If this is done then though the satellite orbits the earth it appears to be stationary above one point of the earth. This orbit must be above, or very near to, the equator. For the earth this altitude is approximately 36,000 km (22,000 miles)
What is the work done by the field of a nucleus in a complete circular orbit of the electron. what if the orbit is elliptical?
In a complete circular orbit of an electron around a nucleus, the work done by the field of the nucleus is zero. This is because the force is always perpendicular to the direction of motion, so there is no displacement along the direction of the force, resulting in no work done. If the orbit is elliptical, there would be work done by the field of the nucleus due to the non-zero component of the force parallel to the direction of motion during the orbital motion.
Why must communication satellites travel 35000 kilometers above earths surface?
The requirement is to place the satellite in such a way that it appears motionless in the sky, as seen from the surface of the earth. This is a great advantage in satellite communication, because if the satellite appears stationary, then the dish antenna on the ground doesn't have to move to follow the satellite ... the dish can be aimed once, and can stay in the same position permanently. In order to have the satellite appear motionless, it has to follow the 24-hour rotation of the earth. The orbital period of any satellite's revolution (around a much larger body) depends only on the average orbital distance. For the earth, the period of a 238,000-mile orbit (where the moon is) is about 27 days, and the period of an orbit that averages about 22,400 miles is 24 hours. So a communications satellite in an orbit with this average distance will complete one revolution around the earth in 24 hours. Wherever it is right now, it will appear in the same exact place 24 hours from now. This is a "geosynchronous" orbit. But that's not good enough yet. The orbit may have the right average distance, but it may still be very eccentric, ranging from close-in to way-out in the course of 24 hours. If that's the case, then it will move faster when it's closer in, and slower when it's farther out. Watching it from the earth, it'll appear to move back and forth like a pendulum, returning to the same position every 24 hours but making a complete left-right swing every day. This still wouldn't be useful for stationary ground-based dish antennas. So another restriction on the orbit is that it must not only be at the correct average distance, but it must also be very close to a circular shape, so that the satellite's speed in the orbit is nearly constant. And there's yet one more requirement that the orbit has to satisfy. Consider this in your imagination: There can't be an orbit where the satellite circulates over, say, a little 20-mile circle around the North Pole. A satellite orbit has to revolve around the "whole earth", which is a clunky way of saying that the center of the earth has to be in the plane of the orbit. The orbit can "incline" as much as you want ... the satellite can stay over the equator all the time, or swing from North pole to South pole and back again, but the center of the orbit always has to be at the center of the earth. Now you can see the final requirement for a communications satellite: If the orbit is inclined to the equator, then the satellite will appear to swing above and below its average location in the sky every 24 hours, which also makes it hard for a stationary antenna on the ground. The orbit has to be oriented at 'zero inclination', meaning it lies directly above the equator at every point. Now, finally, with a nearly circular, equatorial orbit, of exactly the right size, the satellite appears motionless in the sky, and all those little 18-inch TV dishes on the neighborhood rooftops can be pointed once at the satellite and never need to move. A satellite in this orbit is not only "geosynchronous" (24-hour orbital period), but also "geostationary" ... motionless relative to a point on the earth.
How much work is done by earth revolving around the sun?
yes the sun does do work for earth it does a whole lot it gives us light and it also gives ussomething not to stare at and if you stare the sun you could damage your eyesAnother Answer"Does sun do any work on earth?" YES, yes, yes! On Earth, all energy (exceptgeothermal) in all forms, was and is produced by the Sun's energy intersectedand accumulated by the surface of our planet.And Yet Another:OK, folks. Nice dutiful expressions of our gratitude and appreciation for all thatthe sun does for us. For its light, its heat, its various forms of energy, its benefitsand benevolent bountiful sustenance of life on our planet. But "work" ? Not.In the strict, technical sense, "work" means force acting through a distance. Youknow that this is what the question is fishing for, otherwise there would have beenno reason for it to start out with "Earth orbit the sun". In a gravitational orbit, thecentripetal force doesn't act in the direction of the orbiting body's motion, so nowork is done by the force.
International space station orbits the air in an approximately circular orbit at a high 375 km above the earth surface in one complete orbit is the work done by the earth on the space station positive?
No, the work done by the Earth on the space station is not positive. The gravitational force between the Earth and the space station acts towards the center of the Earth, which is perpendicular to the direction of motion of the space station. Therefore, the work done by the Earth on the space station is zero because the force and displacement are perpendicular to each other.
How is a satellite placed in orbit and why it retains its position in space?
This can vary depending on the function of the satellite. In general, the satellite is launched by unmanned rockets or from the space shuttle payload bay at the correct altitude. After the satellite is released from the launch vehicle, the speed of a satellite is adjusted so that the rate at which it is being pulled back toward the earth is the same as the rate at which the earth is turning underneath it. So it is continually falling but not hitting the earth. This is what is also happening to the space shuttle when in earth orbit and the ISS. Satellites in geostationary orbit - where they appear to remain over a single point on the earth - must have a circular orbit for this to occur. That is why they are placed over the equator. Any other orbit is elliptical in shape. The problem that arises is that the earth is not perfectly round, even at the equator, and so the orbit of geostationary satellites must be adjusted every two weeks to compensate for this. The engines are remotely fired for the correct amount of time. When the fuel runs out, this can no longer be done. Orbital mechanics is a complex and detailed concept to understand. See some of the Web Links to the left.
Why There is no work done when satellite rotate around earth?
With satellites, the object is not to escape Earth's gravity, but to balance it. Orbital velocity is the velocity needed to achieve balance between gravity's pull on the satellite and the inertia of the satellite's motion -- the satellite's tendency to keep going.This is approximately 17,000 mph (27,359 kph) at an altitude of 150 miles (242 km). Without gravity, the satellite's inertia would carry it off into space. Even with gravity, if the intended satellite goes too fast, it will eventually fly away. On the other hand, if the satellite goes too slowly, gravity will pull it back to Earth.At the correct orbital velocity, gravity exactly balances the satellite's inertia, pulling down toward Earth's center just enough to keep the path of the satellite curving like Earth's curved surface, rather than flying off in a straight line.
