How much work is required to lift a 700kg satellite to an altitude of 1x10^6m above the surface of the earth? The gravitation force is F=GMm/r^2, where M is the mass of the earth, m is the mass of the satellite, and r is the distance between them. The radius of the earth is 6.4x10^6m, its mass is 6x10^24 kg, and in these units the gravitational constant, G, is 6.67x10^-11.
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