Explain why the magnets move towards eachother in this setup

Question

I have two bar magnets (actually stacks of small magnets, but I believe they should behave the same) attached to a stack of (presumably conductive) coins, and not diametrically opposite. When I rotate one bar, the coins rotate based on height (corresponding to the rotation on the part of the magnet they are touching) and the second bar magnet rotates in the same direction as the first. However, the magnets also move around the stack of coins towards each other, which I can't explain. This occurs regardless of the direction of rotation or which magnet is being rotated, etc..

When the magnets start opposite each other, this does not occur.

EDIT: if instead force is applied only to the top coin while the bottom one is held still, the same occurs.

Answer 1

This is on the ground I assume, not in the air. You are holding the magnet on the right side.

When the magnet on the left rotates, it is also acting as a wheel, since it is round and it is rolling on the ground towards the right side, where the other magnet is.

Now you could ask, ok, but why does then the magnet on the right not roll towards the right too, so away from the magnet on the left? Because you are holding the magnet on the right with your hand, as you rotate it, it cannot move relative to the starting position.

If you could somehow try to do this in the air, the magnets would not move closer to each other, since the magnet on the left would have nothing to roll on.