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M2_Lesson 1_Concept of Motion.pptx

1) The document discusses Aristotelian and Galilean views of motion, including vertical, horizontal, and projectile motion. It provides examples of free fall and projectiles. 2) Key figures discussed are Aristotle, who believed heavier objects fall faster, and Galileo, who argued that falling bodies experience constant acceleration regardless of weight through experiments. 3) The acceleration due to gravity near the Earth's surface is approximately 9.8 m/s2. Motion concepts laid by Aristotle and Galileo helped progress science, despite their opposing views.

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In this lesson, you will be able to compare and contrast Aristotelian vs. Galilean views of vertical motion, horizontal motion, and projectile motion.
A lot of Physics can be observed in daily activities. Motion occurs all around you. It refers to a change in a position of any mass with respect to time. It’s easy to recognize but hard to describe. A motion has held the attention of scientists and philosophers since ancient times.
Activity 2.1.1 Find Me Directions: Encircle five words which relate to motion. The words can be read horizontally, vertically and diagonally. 1 point each
•freefall •velocity •acceleration •projectile •speed
Aristotle thought that heavy objects fall faster than light objects in proportion to their weight. Galileo argued that the motion of a falling body should be nearly dependent on its weight and should have constant acceleration through careful measurements of distances and time experiments.
v Several physical quantities help described the motion of objects. Here are some of them:
Aristotle and Galileo were two of the most important historical figures that laid the foundation of motion concepts. Their views regarding motion may be opposite but both helped the progress of science.
Free fall-a body in vertical motion where only gravity is acting on it. It could be an object thrown upward (positive initial velocity), thrown downward (negative initial velocity) or dropped (zero initial velocity).
Projectile- a body or a particle in two- dimensional motion given an initial velocity and it moves along a curved path under the influence of gravity alone
In recent times, the motion of falling bodies has been studied with great precision. When air resistance can be neglected, all bodies experience equal acceleration regardless of their size and weight. This constant acceleration g is called the acceleration due to gravity. The standard value of g at or near the earth’s surface is approximately 9.8 m/s2.
1. When does an object undergo acceleration? A. when it is changing direction B. when it is moving faster C. when it is moving slower D. all of these
2. A ball is thrown upwards and returns to the same location. When it turns, how much is the speed compared with the initial speed? A. half as much B. B. the same C. twice as much D. four times as much
3. How does Galileo's interpretation of motion differ from Aristotle's? Galileo emphasized A. rates of time B. the acceleration of free fall C. the role of distance in describing motion D. none of these
4. From what you have learned from Galileo, what will happen if you roll a ball along a level surface? A. keep rolling if friction is absent B. roll as long as its inertia nudges it along C. soon roll in the opposite direction D. soon slow down due to its natural place
5. What is the straight-line motion caused by the gravitational pull of the earth? A. free-fall motion B. horizontal motion C. projectile motion D. none of these
M2_Lesson 1_Concept of Motion.pptx
M2_Lesson 1_Concept of Motion.pptx
M2_Lesson 1_Concept of Motion.pptx