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A moon of a planet Rusean has an orbital period of 5 days and is at a distance of 5 units from the centre of the planet. Another moon is discovered at a distance of 20 units from the centre of Rusean. Which of the following will be closest to the orbital period of the newly discovered moon?
The Space Shuttle orbits 300 km above the Earth’s surface. If the Earth’s radius is 6400 km, what is the gravitational acceleration experienced by the Space Shuttle while in this orbit?
The minimum initial velocity required by a space probe to just escape the gravitational pull of a planet is called escape velocity. Which of the following quantities does NOT affect the magnitude of the escape velocity?
Two satellites, X and Y are in orbit at altitudes of 800km and 36000 km respectively. Which statement about X and Y is correct?
Which of the following must hold in order for a satellite to remain in orbit around the Earth?
Starsat is a satellite orbiting with an altitude of 630 km. Tassat is another satellite orbiting with an altitude of 7 630 km. What would be the centripetal acceleration of Starsat?
Which of the following factors affect the escape velocity from the planet?
I. the mass of the planet.
II. the mass of the object trying to escape.
III. the distance from the centre of the planet to the centre of the escaping object.
IV. the speed of light.
Two satellites move in circular orbits around the earth. The radius of orbit of the outer satellite is three times the radius of the orbit of the inner satellite as measured from the Earth’s centre. If the orbital speed of the inner satellite is v, then what is the speed of the outer satellite?
Which of the following correctly describes a geostationary orbit?