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The International Space Station (ISS) orbits 400 km above the surface of the Earth. The mass...

The International Space Station (ISS) orbits 400 km above the surface of the Earth. The mass of the ISS is 419,455 kg (source: NASA website), the mass of the Earth is 5.98×1024 kg, and the radius of the Earth is 6.37×106 m.

  1. Calculate the gravitational force exerted by the Earth on the ISS.
  2. Is the gravitational force exerted by the ISS on the Earth greater, the same, or less than your answer in part (a)? Explain why.
  3. Calculate the speed of the ISS in its orbit.
  4. How many minutes does it take the ISS to complete one orbit around the Earth?
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