Take a pair of bar magnets. Place the longer side of one of the magnets over three round-shaped pencils or wooden rollers as shown in Fig. Now bring one end of the other magnet near the end of the magnet placed on the rollers. Make sure that the two magnets do not touch each other. Observe what happens. Next, bring the other end of the magnet near the same end of the magnet placed on the rollers Fig. Note what happens to the magnet placed on the rollers every time another magnet is brought near it.
When unlike poles of the magnet are brought near the other magnet, they attract each other and moves in the direction of another magnet. When like poles of a magnet are brought near to the other magnet, they repel each other and moves in the direction away from the other magnet.
Thus, the force exerted by a magnet on another magnet is a type of non-contact force.