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5/31 MCQs for:
Gravitational fields
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?
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?
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?
Satellite A has twice the mass of satellite B, and rotates in the same orbit. Compare the two satellite's speeds.
The innermost moon of Jupiter orbits the planet with a radius of 422 x 103 km and a period of 1.77 days. What is the mass of Jupiter?