When a small magnet is allowed to fall through an aluminium pipe,it falls with an acceleration less than $g$. Why?

(N/A) As the magnet falls through the aluminium pipe,the magnetic flux linked with the pipe changes.
This change in magnetic flux induces eddy currents in the aluminium pipe according to Faraday's law of electromagnetic induction.
According to Lenz's law,these eddy currents create a magnetic field that opposes the motion of the falling magnet.
This opposing force acts upwards,reducing the net downward force on the magnet.
Consequently,the acceleration of the magnet becomes less than the acceleration due to gravity $(g)$.