If a satellite circled Earth at a distance equal to the Earth– Moon distance, how long would it take for it to make a complete orbit? In other words, what would be its period?

Q: A spy satellite is in circular orbit around Earth. It makes one revolution in 6.40 h. Mass of Earth…

A:

Q: Discuss why a satellite can orbit at 5 km above the Moon, but not at 5 km above Earth.

A: The earth's atmosphere is surrounded by air molecules about 600 km above the earth's surface. And at…

Q: A 600-kg satellite is in a circular orbit about Earth at a height above Earth equal to Earth’s mean…

A: The forces can be of different types. They can be contact and noncontact forces. Contact forces are…

Q: Calculate the time period of a satellite revolving near the surface of earth. Given radius of earth…

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Q: Given that the Moon orbits Earth each 27.3 d and that it is an average distance of 3.84×108m from…

A: From Kepler’s third law

Q: 7.2 For a lunar vehicle which is injected at perigee near the surface of the Earth, determine the…

A: Eccentricity is the term used in the study of Astronomical dynamics. It is a dimensionless quantity.…

Q: Can a satellite coast in a stable orbit in a plane that doesn’t intersect the Earth’s center? Defend…

A: A satellite is able to revolve around a planet when the centripetal force on the planet is balanced…

Q: What is the shape of the orbit when the velocity of the satellite is everywhere perpendicular to the…

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Q: You wish to put two satellites into a circular orbit of h above the earth's surface. One satellite's…

A: The circling speed of the satellites around the Earth is given by,

Q: Suppose that a satellite is moving at a speed of 2,000 m/s in a circular orbit around a planet. If…

A: Let the mass of the satellite is denoted by m moving with velocity v and acceleration a. The…

Q: The dashed lines show three circular orbits about Earth. Rank the following quantities from greatest…

A: The smallest orbit will have the highest orbital speed therefore (a) The order of orbital speeds…

Q: Why does a satellite need no fuel to move round a planet in a fixed orbit?

A: Any object needs centripetal acceleration to keep itself in circular motion.

Q: The positions of a satellite in elliptical orbit are indicated. Rank these quantities from greatest…

A: a. Gravitational force: A > B > C > D b. Speed: A > B > C > D c. Momentum: A >…

Q: Upon which does the speed of a circling satellite not depend: the mass of the satellite, the mass of…

A:

Q: Would the speed of satellite in close circular orbit about Jupiter be greater than, equal to, or…

A: An object which is revolving around a mass rather than falling into it is known as a satellite of…

Q: A satellite in an elliptical orbit with a perigee of 500 km and apogee of 2000 km above earth…

A:

Q: Is the sum of kinetic and potential energies a constant for satellites in circular orbits, in…

A: Determining if the sum of potential energy and kinetic energy is constant or not in circular orbits:

Q: Communications and weather satellites are often placed in geosynchronous \parking" orbits above…

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Q: What is geostationary satellite?Give two functions of such a satellite.

A: Geostationary satellite is a satellite which revolves around the earth. It completes one revolution…

Q: An astronaut lands on a planet that has the same mass at the Earth but twice the diameter. How would…

A: The gravitational field strength is given by

Q: What must be the altitude of all the synchronous satellites that are placed in orbit around the…

A: The altitude of all the synchronous satellites that are placed in orbit around the earth is also…

Q: A particular satellite was placed in a circular orbit about 668 mi above Earth. (a) Determine the…

A: Given: Distance between earth surface and satellite = 668 mi. = 1075.04 km. Mass of earth M =…

Q: Given that the Moon orbits Earth each 27.3 d and that it is an average distance of from the center…

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Q: What are the necessary conditions for a satellite to appear stationary?

A: 1) the time period should be 24 hours.2) the orbital plane of the satellite must be same as that of…

Q: What happens to an Earth satellite's period when the satellite is placed into a higher orbit?

A: There are essentially three types of Earth orbits: high orbit, medium orbit, and low Earth orbit.…

Q: At what part of elliptical orbit does an Earth satellite have the greatest speed? The lowest speed?

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Q: Is the sum of kinetic and potential energies a constant for satellites in circular orbits, in…

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Q: For orbits of greater altitude, is the period of revolution of satellite longer or shorter?

A: Orbital speed of any satellite can be given using Kepler’s 2nd law of  motion which explain square…

Q: What would be the path of the Moon if somehow all gravitational forces on it vanished to zero?

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Q: An artificial satellite is going round the earth, close to its surface. Calculate time taken by it…

A: As the satellite is moving very close to earth's surface, it can be assumed that the radius of orbit…

Q: Why doesn't the force of gravity change the speed of a satellite in circular orbit?

A: The gravitational force can’t change the speed of a satellite in circular orbit because the…

Q: Whose gravitational force is strong on earth ,sun or moon??

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Q: The moon goes around the earth once every 27.3 days. If the moon could be brought into a new…

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Q: A 760-kg satellite is in a circular orbit about Earth at a height above Earth equal to Earth's mean…

A:

Q: At what point in its elliptical orbit about the Sun is the acceleration of Earth towards the Sun at…

A: An object which is revolving around the mass rather than falling into it is known as a satellite of…

Q: Discuss why a satellite can orbit at 5km above the Moon, but not at 5km above Earth.

A: An object which is revolving around an object rather than falling into it is known as a satellite of…

Q: How much time is taken for complete revolution of a satellite in close orbit about the Earth?

A: Given:Mass of the earth = 6 X 1024 kgRadius of the earth = 6371 kmGravitational constant = 6.67 X…

Central Force

Central force is the force that acts along the center of mass of one body to the center of mass of another body. Its direction from or away from a point on a body to another is called the center of the force. Such forces include gravitational force between two massive objects or electrostatic forces between two charged particles. So from atoms to planets, the central forces play an important role in shaping our daily lives. One of the remarkable features of central forces is that they are conservative, i.e. the total energy of a central force system can always be expressed as a gradient of a potential energy function.