SOLAR SYSTEM

Detailed explanation-1: -The motion of an orbiting satellite can be described by the same motion characteristics as any object in circular motion.

Detailed explanation-2: -A satellite in a circular orbit has uniform angular velocity. By Kepler’s second law, however, a satellite in an elliptical orbit cannot have uniform angular velocity; it must travel faster when it is closer to the Earth.

Detailed explanation-3: -The Short Answer: Gravity-combined with the satellite’s momentum from its launch into space-cause the satellite to go into orbit above Earth, instead of falling back down to the ground.

Detailed explanation-4: -EXPLANATION: The satellite moves on a circular path around the earth. There is a gravitational force by the earth on satellite and a centrifugal force on the satellite.

Detailed explanation-5: -A circle is a special case of an ellipse and it is theoretically possible for an orbit to be circular. In the real world, a such an orbit is unlikely.

Detailed explanation-6: -A satellite maintains its orbit by balancing two factors: its velocity (the speed it takes to travel in a straight line) and the gravitational pull that Earth has on it. A satellite orbiting closer to the Earth requires more velocity to resist the stronger gravitational pull.

Detailed explanation-7: -This special, high Earth orbit is called geosynchronous. A satellite in a circular geosynchronous orbit directly over the equator (eccentricity and inclination at zero) will have a geostationary orbit that does not move at all relative to the ground. It is always directly over the same place on the Earth’s surface.