Discussion
An astronaut experiences weightlessness in space satellite because
Answer: B
The astronaut is weightless because both the astronaut and the satellite are in free fall towards earth.
Gravity at the height of an orbiting satellite is still nearly as strong as at the surface. But the satellite and everything in it fall towards the earth with the same acceleration, so the floor exerts no normal force on the astronaut, and it is that contact force which we feel as weight.
So the explanation is not that gravity is small (in any direction) there, nor anything to do with the moon's pull.
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