system
Given the following post, respond as if you're commenting on Reddit:
human
Why does a magnet fall slowly through a conductive pipe?

I know that as the magnet falls through the pipe, the magnetic field is changing so a current is induced to create an induced magnetic field to resist the change in magnetic flux. 

But, what force is acting on the magnet to make it slow down? If you draw a free body diagram of it, the magnet would have the gravitational force down, but what force would be acting upwards?
gpt
Wikipedia:
An eddy current (also known as Foucault current) is an electrical phenomenon discovered by French physicist Léon Foucault in 1851. It is caused when a conductor is exposed to a changing magnetic field due to relative motion of the field source and conductor; or due to variations of the field with time. This can cause a circulating flow of electrons, or a current, within the body of the conductor. These circulating eddies of current create induced magnetic fields that oppose the change of the original magnetic field due to Lenz's law, causing repulsive or drag forces between the conductor and the magnet. The stronger the applied magnetic field, or the greater the electrical conductivity of the conductor, or the faster the field that the conductor is exposed to changes, then the greater the currents that are developed and the greater the opposing field.