What is the difference between natural motion and violent motion?

natural motion - included the apparent movements of celestial objects, the faling of objects and substances have a natural place or level such as air above, water below and they proceed in the most direct way, along straight vertical paths to their natural places. violation motion - which were any motions... show more natural motion - included the apparent movements of celestial objects, the faling of objects and substances have a natural place or level such as air above, water below and they proceed in the most direct way, along straight vertical paths to their natural places.
violation motion - which were any motions resulting from acts of volition of living beings.