A satellite orbits the earth in a circular orbit with constant speed at a distance, d=2200 km above the surface of the Earth (note, this is the distance above the surface, not from the center). The total mechanical energy of this satellite is E=-3.48*1010J. (Hint: Values for the mass and radius of the Earth are found on the equation sheet.) a) What is the mass of the satellite? b) What is the orbital period of the satellite?

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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.