A satellite appears to be at rest when seen from the equator. Its height from the Earth's surface is nearly
Correct answer: A. 35600 km
- A. 35600 km
- B. 356000 km
- C. Such a satellite cannot exist
- D. 6400 km
Explanation
The satellite appears to be at rest when seen from the equator because it orbits the Earth at the same angular velocity as the Earth's rotation. This type of satellite is called a geostationary satellite. The height of a geostationary satellite from the Earth's surface is approximately 35600 km.
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About Satellite Motion and Orbital Velocity
Satellite motion uses gravitational force as the centripetal force required for circular orbit, giving relationships among orbital radius, period and orbital velocity. Questions cover geostationary conditions and weightlessness, while distinguishing orbital velocity, escape velocity and the satellite's tangential speed.
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