A student has a collection of metal bars that keep sticking to each other. She suspects that they might be magnets, so she runs a test.
She holds end V of rod 1, near to each end of the two other rods. The ends are shown in the diagram below.
Her results are as follows (end V):
- Repels end W
- Attracts end X
- Attracts end Y
- Attracts end Z
Which of the metal rods is a magnet?