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Many people mistakenly believe that astronauts who orbit the Earth are "above gravity." The mass of the Earth is 6x10 ^ 34 kg and radius is 6.38x10 ^ 6 m (6380 km) Use Newton's law to show that in the territory of the special ferry, 200 km above the earth's surface, the force of gravity on the shuttle is approximately 94% that of the Earth's surface

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  1. gravity follows an inverse-square relation

    [6380 / (6380 + 200)]^2 = .940

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  2. Is the process really that straightforward? I'm not quite good at physics.

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