Can you solve the MAGNET RIDDLE? ft YouTube CEO Susan Wojcicki

If you have a mallet made of a non magnetic material like brass then it is not attracted to the magnet. However you can still move the magnet across the surface of the brass and it will induce eddy currents in the metal which will create an opposing magnet field which will restrict the movement of the magnet which you can feel. To jus rub both bars quickly accross the mallet and the one which restricts movement a little is the magnet.