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5/31 MCQs for:
Gravitational fields
The planet Jupiter is 7.78 x 1011 m from the Sun. How long does it take for Jupiter to orbitonce about the Sun? (The distance from the Earth to the Sun is 1.50 x 1011 m.)
An astronaut goes out for a 'space-walk' at a distance above the Earth equal to the radius of the Earth. What is her acceleration due to gravity?
Two moons orbit a planet in nearly circular orbits. Moon A has orbital radius r, and moon B has orbital radius 4r. Moon A takes 20 days to complete one orbit. How long does it take moon B to complete an orbit?
Two planets have the same surface gravity, but planet B has twice the radius of planet A. If planet A has mass m, what is the mass of planet B?
The Earth has radius r. A satellite of mass 100 kg is at a point 3r above the Earth's surface. What is the satellite's weight?