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The following figure shows a spiral tube lying flat on a table, seen from above.
A ball enters the tube with a sufficiently high velocity to emerge from the other end. What path does it take when it comes out of the tube?
Average of correct answers: = 60%
This is the second easiest item, which is astonishing. In another published tests this item scored much lower.
Next time I would exclude this item because most students know about it.