2. Aristotle- explained the behaviour of an object, such as a rock,
in terms of the “essential nature” of that object. For Aristotle, a
non-measurable force existed within an object that compelled it
to behave in a certain manner. A stone, for example, was
classified by Aristotle as a heavy object, while fire was defined
as a light object.
Aristotle’s- account of motion can be found in the Physics. By
motion, Aristotle (384-322 B.C.E.) understands any kind of
change. He defines motion as the actuality of a potentiality.
Initially, Aristotle's definition seems to involve a contradiction.
However, commentators on the works of Aristotle, such as St.
Thomas Aquinas, maintain that this is the only way to define
motion.
12. Aristotle
-Initial impetus is supplied to an object,
making it move a new region.
Galileo
-A projectile moves in constant horizontal
motion simultaneously with a constant
vertical acceleration.