lecture note in Science ( Chemistry ,Physics and Earth Science, Lecture notes of Environmental science

Download lecture note in Science ( Chemistry ,Physics and Earth Science and more Lecture notes Environmental science in PDF only on Docsity! A DETAILED LESSON PLAN IN SCIENCE 9 Content Standard: The learners demonstrate an understanding of the projectile motion, impulse and momentum, and conservation of linear momentum. I. Learning Outcomes/Objectives: At the end of the lesson, the learners are expected to: a. Define and identify the factors that affects momentum and impulse; b. Relate impulse and momentum to collision of objects (e.g., vehicular collision) [S9FE - IVb -36] and; c. Appreciate the importance of understanding the causes and effects of collision-related damages/injuries by citing real life situations. II. Subject Matter: a. Topic: Momentum and Impulse References: Science 9 Learner’s Material, Alvarez, L.A., et al, 2014 pages 256 – 259; Practical Science 9, Moros, E.M., et al, 2018 pages 333 – 339; https://www.physicsclassroom.com/class/momentum/Lesso n-1/Momentum-and-Impulse-Connection https://www.khanacademy.org/science/physics/linear- momentum/momentum-tutorial/a/what-are-momentum-and- impulse b. Materials: Laptop, Power Point presentation, and Pictures c. Values Integration: To become aware of the importance of the road sign indicating the speed limit to be warned and guided to any collision-related damages/injuries. III. Lesson Proper/ Procedure A. Preliminary Activities Teacher’s Activity Student’s Activity i. Opening Prayer Good morning, everyone! Let’s start our day with a morning prayer. Who wants to lead the prayer? (One student will lead and everyone will pray.) ii. Classroom Management Now, before we begin, let me remind you of our class rules. (The teacher will discuss the rules and reminders for online class.) Is everything clear? iii. Checking of Attendance Class secretary, please check the attendance for today. Is there any absent for today? Very good class! Keep it up! iv. Review of the Past Lesson Before we proceed to our new topic, let us first have a short review of our previous lesson. What have you learned yesterday? Good job! I’m glad that you remember our past lesson. So, to check, we will play a game entitled, “Fact or Bluff.” I want you all to participate. Just give me a thumbs up if you think the statement is true and thumbs down if it is false. Is it clear? First statement, projectile motion is the motion of an object thrown or Yes, Ma’am! Yes, Ma’am! No one is absent for today, Ma’am. Yesterday, we have learned the projectile motion. Yes, Ma’am. So, based on the given situation which among the vehicles would create a greater destruction. Exactly! Having said that, what do you think is the first factor? Very good! For the second situation, please read. So, based on the given situation which among the two cars would have the difficulty to suddenly stop? That is correct! With that, what is the second factor? Exactly! To sum it up, the factors that affects momentum is mass and velocity. Operationally, momentum is defined as the product of mass and the velocity of an object. In equation, p = mv where: p = is the momentum m = is the mass v = is the velocity For stationary objects where the velocity is zero, the momentum is also zero. Is it clear? (One student will read.) The cargo truck ma’am. Ma’am, the mass of the vehicles. (One student will read.) Ma’am, it would be Car A. Ma’am, the velocity of the cars. Yes, Ma’am. Now, the question is how would you stop a moving object? Precisely, to stop a moving object, it is necessary to apply a force against its motion for a period of time. The greater the momentum of an object, the harder for it to stop. As the force acts upon the object for a given amount of time, the object's velocity is changed; and hence, the object's momentum is changed. Thus, Anyone who has an idea about the given formula? Very good! Simply, impulse is the amount of force you apply for a certain amount of time to cause a change in momentum. In physics, the quantity Force • time is known as impulse. And since the quantity m•v is the momentum, the quantity m• v mustΔ be the change in momentum. The equation really says that the Impulse = Change in momentum Impulse is a term that quantifies the Ma’am, I think you should apply some force. Ma’am, the applied force multiplied by the change of time is equal to the mass multiplied by the change of velocity. overall effect of a force acting over time. It is conventionally given the symbol J, and expressed in Newton- seconds. In equation, J = Ft where: J = is the impulse F = is the force t = is the time So, take note of these quantities and equations because next time we will solve some problems. iii. Application Now, I want you to look at this picture. What is the meaning of this sign? Very well said! Drivers should be aware of different road signs especially with their speed limit for road safety. How about safety gears? Why is it important to wear seatbelts and helmets? Yes, Ma’am. (The students will answer.) (The students will answer.)