An astronaut and his gear ma 840 kg are at rest with, Ask an Expert

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An astronaut and his gear (mA = 84.0 kg) are at rest with respect to his shuttlecraft (mS = 10,000 kg).

The astronaut and the shuttlecraft are initially separated by a distance of 12.0 m. If the astronaut moves farther away from the shuttlecraft to a distance of 23.0 m, what is the change in gravitational potential energy for the astronaut's huttlecraft system?

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