A child enters a carousel that takes one minute to revolve once around. The child enters at the point(0,1)

, that is, on the due north position. Assume the carousel revolves counterclockwise. What are the coordinates of the child after thirty seconds. trying to understand this and I'm just not getting it. I understand that he does half a revolution and if he did it for 15 seconds his coordinates would be (-1,0) but I'm not understanding it for 30 seconds.