Natural motion refers to the inherent tendency of an object to move towards its natural place. For example, a rock falls to the ground because its natural place is on the ground. Natural motion is also associated with the four elements: earth, water, air, and fire. Earth and water have a natural tendency to move downward, while air and fire have a natural tendency to move upward.
Violent motion, on the other hand, refers to any motion that is not natural. Violent motion is caused by an external force being applied to an object. For example, if you throw a ball, the ball moves through the air because of the force you applied to it. Violent motion is also associated with the concept of impetus, which is the idea that an object in motion will continue to move in the same direction unless it is acted upon by another force.
In summary, natural motion is the inherent tendency of an object to move towards its natural place, while violent motion is any motion that is not natural and is caused by an external force.
