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highschoolphysics

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  1. highschoolphysics
    The question is: How much gravitational potential energy is required to lift a 9270 kg Progress spacecraft to the altitude of the International Space Station, 424 km above the surface of the Earth? I had used the equation Ugpe= - (GMm)/r and got an answer of -8.71*10^15 J and it said it was wrong. I have no clue where I went wrong or where I could go next.
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