Despite diverging from Aristotle's theory of motion, it appears that Avempace largely agrees with Aristotle's ideas on projectile motion. While there is no known account that lay's out Avempace's ideas over this topic, Avempace gives a short explanation in his commentary of Aristotelian Physics book 8. An interesting piece by Avempace on the theory of projectile motion comes from his example involving a magnet and iron filaments. Magnets present a problem with Aristotle's theory on projectile motion because nothing can be seen physically moving the iron. Avempace, however, believes that a magnet is more complicated than one might think. He presents the idea that the magnet actually moves the air which, in return, moves the iron.