A communications satellite with a mass of 520 kg is in a circular orbit about the Earth. The radius of the orbit is 35,000 km asmeasured from the center of the Earth. Calculate (a) the weightof the satellite on the surface of the Earth and

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Central Force

Central force is the force that acts along the center of mass of one body to the center of mass of another body. Its direction from or away from a point on a body to another is called the center of the force. Such forces include gravitational force between two massive objects or electrostatic forces between two charged particles. So from atoms to planets, the central forces play an important role in shaping our daily lives. One of the remarkable features of central forces is that they are conservative, i.e. the total energy of a central force system can always be expressed as a gradient of a potential energy function.