The force of attraction between the earth and some object is called the weight of that object. The law of gravitation states, then, that the weight of an object is inversely proportional to the square of its distance from the center of the earth. If a person weighs 120 lb on the surface of the earth (assume this to be 3960 mi from the center), how much will he weigh 1300 mi above the surface of the earth?
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