What did Aristotle mean about Natural and Unatural motion??? PLEASE HELP QUICK!

Question

oh come on! please anyone????

what is natural motion?????????

i really need help now! like in a couple of mins it'll be too late!

Answer 1

Aristotle distinguished between "natural" and "unnatural" motion. Bodies moving naturally would move either up or down. Horizontal motion, as in a flying projectile, Aristotle termed "unnatural." Natural motion of a body was a consequence of the amount of the prime substances -- earth, water, air, and fire -- present in that body. Each of these elements had a natural place to which it would move if unimpeded. A stone falls because it contains earth; steam rises because it contains fire. The natural motion of celestial objects he viewed as different from motion on Earth; it was circular motion, with no beginning or end.

Horizontal motion resulted from a pull or push acting on the object. To explain the motion of a projectile, which apparently is not pushed after release, Aristotle assumed that the air flowing around it and filling up the empty space created behind it would push the projectile continuously. Aristotle also noticed that bodies in a denser medium, such as water, fall at a slower speed than those in a less dense medium, such as air. From this he concluded that an object would fall at infinite speed in a vacuum; since he believed that infinite speed was not possible, an absolute vacuum could not exist.

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