Aristotle believed that all motion required a mover and that natural motion was caused by inherent tendencies in objects to seek their natural place. He distinguished between natural motion (up and down) and violent motion (forced movement). Aristotle also argued that an object's speed of motion was proportional to the force acting upon it.
Aristotle categorized motion into natural motion and violent motion. Natural motion occurs without external force, such as an apple falling down due to gravity. Violent motion is caused by an external force, like pushing a rock.
In physics, a point of view with regard to motion is called a reference frame. It is used to describe the motion of an object relative to a chosen point or object, providing a frame of reference for measuring distances and velocities. Different reference frames may result in different observations of the same motion.
Motion is described with respect to a frame of reference, which is a point of view used to measure and describe the position, speed, and acceleration of objects in motion. This frame of reference can be stationary or moving, depending on what is being observed.
Motion and rest are relative concepts in physics, meaning that an object can be in motion or at rest depending on the frame of reference. For example, a person seated in a moving train is at rest relative to the train but in motion relative to an observer outside the train. This demonstrates how motion and rest are interconnected depending on the chosen point of view.
the point of view that you describe motion from is whatever you choose it to be. generally we describe motion relative to earth. for example you could say that a car is moving 60mph north, and it would be assumed to be moving relative to earth; but if someone is riding their bike 10mph north, then the car is moving 50mph north relative to the bike. you see, you could describe the car moving compared to a star in a distant galaxy if you wanted, but that would be useless information so you should choose something relative to the problem.
Aristotle categorized motion into natural motion and violent motion. Natural motion occurs without external force, such as an apple falling down due to gravity. Violent motion is caused by an external force, like pushing a rock.
me
By observing the object
philosophing
pythias
Nichomachus...
Nichomachus...
aqua
365 BC
My view and understanding of motion was founded by Dr. Everett Mark Hafnerat the University of Rochester. It was a hot topic at that time, as motion hadjust been invented not too much earlier.
At the center of Aristotle's model was the concept of the unmoved mover, which served as the ultimate cause and source of motion in the universe. It was an eternal, unchanging being that set everything in motion without being moved itself.
The observed retrograde motion of planets led Ptolemy to add epicycles to Aristotle's system. Epicycles were small circles that planets moved in on their larger circular orbits around Earth in order to explain the appearances of retrograde motion.