Aristotelian ang Galilean Theory of Motion.pptx

Aristotelian ang Galilean Theory of Motion.pptx

1. Aristotle Theory of Motion

2. Aristotle’s Theory of Motion Aristotle believed that the Earth consists of matter formed by the combination of four primordial elements: Earth Water Air Fire

3. Each of these elements tend to seek its natural place on the terrestrial region. Fire occupies the highest position; beneath fire, air; beneath air, water; and earth occupies the lowest position. The natural motion of objects are based on the movements of these elements.

4. Aristotle also added that the universe was formed from the fifth element “ Aether ” or ether.

5. Aristotle’s ideas on motion An object which is made of “Earth materials” fall toward the center of the Earth because it seeks its natural place.

6. Aristotle’s ideas on motion Heavy objects fall faster than light ones. An increase in speed is proportional to the weight of the object.

7. Aristotle’s ideas on motion Objects fall faster in air than in water. A decrease in speed is proportional to the resisting force of the medium (water or air).

8. Aristotle’s ideas on motion Objects can be moved away from their natural place. This type of motion is called violent motion which is caused by motive force.

9. Do you think Aristotle’s ideas are consistent with what is happening in the real setting?

10. Despite certain limitations, Aristotle’s ideas about motion survived for nearly two thousand years because of the following: The theory was consistent with common sense. For example, it is a common experience that heavy objects fall faster than light ones. No other theories about motion were available during Aristotle’s time. The quantitative method of observation to prove the validity of Aristotle’s theory was not yet developed.

11. Galileo’s Theory of Motion

12. Galileo’s Theory of Motion Galileo employed methods of calculation and techniques of measurement to arrive at accurate mathematical descriptions of horizontal and vertical motion of objects.

13. Galileo’s ideas about motion A marble made to roll on a flat surface would roll for an infinite amount of time. It would continue rolling as long as there is no outside force acting on it to change its state of motion. This is because the marble has inertia-the tendency of an object to resist any change in its motion.

14. Galileo’s ideas about motion Two objects of different weights dropped simultaneously from the leaning tower of Pisa struck the Earth’s surface at the same time. However, there is no historical record showing evidence that Galileo performed the experiment in the tower.