So my co-workers and I have had a dispute after hearing a podcast on NPR about earth's rotation. One question was about what would happen if one side of the earth always faced the sun (tidal locked) and another question was about what would happen if the earth stopped rotating. From what I've gathered tidal lock does not mean no rotation. But if the earth stopped rotating would a probable outcome be a tidal lock? Is it possible for a body in orbit to never rotate? Lastly, my co-worker is convinced the moon on the left, which always has the same side pointed to the center, is not rotating. To me it seems the one on the right is not rotating. But ,like I asked before, is the right side even possible?