Aristotle's theory of motion stated that a constant force produces a uniform motion; Abu'l-Barakt al-Baghdd + ( c . 1080 1164 / 5 ) contradicted this, arguing that velocity and acceleration are two different things, and and that force is proportional to acceleration and not velocity.
32.
Atoms " must " be able to throw it into vibration, if they are oscillating or revolving at sufficient speed; otherwise they would not emit light or any kind of radiation; but in no case do they appear to drag it along, or to meet with resistance in any uniform motion through it ."
