Why can't you pick up coins with a magnet?

In the context of the video, this principle is applied to distinguishing real silver coins from fake ones. Real silver coins, being non-magnetic, will fall slowly down the slide, mimicking the behavior of the magnet in the copper tube.

On the other hand, fake silver coins, which may contain magnetic materials, will slide down the tube normally, without experiencing the slowing effect.

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The phenomenon demonstrated in the video is akin to dropping a magnet inside a copper tube.

When a magnet is dropped through a copper tube, it experiences a slowing effect due to the electromagnetic induction caused by the motion of the magnet within the conductive material of the tube.