Here's why:

* Copper is not ferromagnetic. This means it doesn't have the property of being strongly attracted to magnets. Ferromagnetic materials, like iron, nickel, and cobalt, are the ones that are strongly attracted to magnets.

* Copper is diamagnetic. This means it is very weakly repelled by magnets. The effect is so weak that it's practically unnoticeable.

Instead of being repelled, copper exhibits a more interesting phenomenon when placed in a magnetic field:

* Eddy currents: When a magnet moves near copper, it induces electrical currents within the copper. These currents, known as eddy currents, create their own magnetic field that opposes the original magnetic field. This opposition leads to a slight "braking" or "damping" effect on the magnet's movement.

So, while copper isn't repelled by a magnet in the way iron is attracted, it does have a subtle interaction due to its diamagnetic properties and the creation of eddy currents.