UNIVERSE
SATELLITESICY BODIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Speed of satellite:decreasesTime For One Orbit Of Earth:decreases
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Speed of satellite:decreasesTime For One Orbit Of Earth:increases
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Speed of satellite:increasesTime For One Orbit Of Earth:decreases
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Speed of satellite:increasesTime For One Orbit Of Earth:increases
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Detailed explanation-1: -The satellite could be knocked or moved closer or farther from the object it is orbiting. If it moved closer, gravity would pull more strongly, if it moved farther, gravity would have less of a pull. The satellite could dip into the atmosphere of a planet and be slowed by that.
Detailed explanation-2: -The point farthest away from the Earth on the blue elliptical orbit is called the apogee and the point closest is called the perigee.
Detailed explanation-3: -The velocity of the satellite in an orbit close to earth’s surface is nothing but it’s orbital velocity. Hence from the above equation, we can conclude that orbital velocity depends on acceleration due to gravity and radius.
Detailed explanation-4: -As a satellite orbits in an elliptical path, the force of gravitation is greatest at the times when it is closest to the Earth; this force causes a greater acceleration and speed of the satellite along these nearest locations of its orbit.
Detailed explanation-5: -To stay in orbit, a satellite has to travel at a very high velocity, which depends on the height. So, typically, for a circular orbit at a height of 300 km above the Earth’s surface, a speed of 7.8 km/s (28, 000 km/h) is needed. At this speed, the satellite will complete one orbit around the Earth in 90 minutes.