As people envision moving out into space in the future, one possibility is living in some sort of space station and not on a planet. But without a planet, you would have continual weightlessness which is not tolerated very long by the human body. One way to get around this is to imagine taking a very large diameter tube and bending it into a circle (like a doughnut). The people would live inside the tube and you could create "gravity" artificially by rotating the whole tube. Suppose that scientists figured out the correct size and rotation rate so that people would feel the same gravity as on earth.

As the people would be walking around in this environment they would be walking on the wall closest to the outside like picture B and not picture A.

Explain why this is true. Remember that the net radial force is always produced by one or more of the real forces (tension, normal, friction, etc) that we have previously introduced. As part of your explanation, label diagram B with the real force that is producing the radial acceleration. Note that labeling it F_R is incomplete.