InterviewSolution
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a satellite revolves around the earth but does not fall on it because |
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Answer» Man-made satellites don't fall out of space for the same reason that the moon (a big satellite) doesn't crash into the earth, or that the Earth doesn't crash into the Sun. The reason is actually described through Newton's laws of motion. A moving object will continue to move in a straight line at the same speed unless a force acts on it. For an object to move in a circle, a force has to act on it all the time.This force is called thecentripetal force. It acts towards the centre of the circle. Gravity is the centripetal force that keeps planets moving around the Sun, and satellites moving around planets. Gravity is the universal force of attraction between masses. It provides the centripetal force needed tokeep a satellite in orbitaround a planet, or a planet inorbitaround a star such as the Sun. because there is gravity that holds the satellite |
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