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Newton's law of gravitation

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When in orbit, a communication satellite attracts the earth with a force of F and the earth-satellite gravitational potential energy (relative to zero at infinite separation) is - U.

1. Find the satellite's altitude above the earth's surface.
Take the radius of the Earth to be r_e.

2. Find the mass of the satellite.
Take the gravitational constant to be G, the mass of the Earth to be m_e.
m =

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The problem has been solved using Newton's law of gravitation.

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