HOW IS MECHANICAL ENERGY IS TRANSFORMED.pptx

The sum of the kinetic and potential energies of a system constitutes mechanical energy. In a conservative system, the total mechanical energy is constant. In this system, only conservative forces are present and, therefore, a decrease in potential energy is equal to an increase in kinetic energy and vice versa.

1. Prayer

2. Lets Have a recap!!!

3. Toy Car racing!!!

4. Instruction In this activity, I will divide you into three groups I will mark the starting and finish lines on the race car The first group whose car crosses the finish line will be declared the winner

5. Toy Car racing!!!

6. Conservation of Mechanical Energy HOW IS MECHANICAL ENERGY IS TRANSFORMED?

7. Group Activity!!!

8. Group 1 : Master the Bow “The task is to develop or create a model of a device that resembles a bow and arrow.” Guide Questions: 1. What happens to the motion of the arrow when the bowstring is released? 2. What do you think is the energy happens in these experiments? 3. How does the energy stored in the bow transform when the arrow is released? Note: In reporting the activity each group will have 2 representatives, 1 for demonstration and 1 for reporting

9. Group 2: Catapult Craze “The task is to develop or create a model of a device that resembles a catapult” Guide Questions: 1. What happens to the motion of the object when you release the spoon? 2. What do you think is the energy that happens in these experiments? 3. How does the energy stored in the catapult transform when the projectile is launched? Note: In reporting the activity each group will have 2 representatives, 1 for demonstration and 1 for reporting

10. Group 3: Swinging Marble “The task is to develop or create a model of a device that resembles a pendulum” Guide Questions 1. How do you explain your observations in terms of potential and kinetic energy? 2. What factors affect the period of a pendulum? 3. How does the energy transform between potential and kinetic as the pendulum swings back and forth? Note: In reporting the activity each group will have 2 representatives, 1 for demonstration and 1 for reporting

11. Conservation of Mechanical Energy HOW IS MECHANICAL ENERGY IS TRANSFORMED?

12. Learning outcomes: At the end of the lesson, learners will be able to: Differentiate the Potential and Kinetic energy; Investigate the conservation of Mechanical Energy; and Design and construct a model that effectively demonstrates the concept of conservation of mechanical energy.

13. ENERGY

14. ENERGY All object regardless of their state in motion ( at rest or moving ) posses a certain amount of Energy

15. ENERGY Energy transforms from one form to another. In such transformation energy is said to be conserved

16. Mechanical Energy Mechanical energy can be in the form of either kinetic energy or potential energy. Mechanical energy can be transformed from one form to another as shown in the change from PE to KE and vice-versa

17. Two kinds of Mechanical Energy Potential energy is the energy possessed by object at rest A. Gravitational Potential Energy- is the energy possessed by an object because of its position and location . B. Elastic Potential Energy - is the energy stored in stretch or compressed elastic materials such as rubber band

18. Two kinds of Mechanical Energy Kinetic energy is the energy possessed by an object by virtue of its motion

19. When the ball is on the top it has Potential Energy however as it falls the potential energy is slowly Converted to Kinetic Energy

20. Mechanical Energy Mechanical energy can be in the form of either kinetic energy or potential energy. Mechanical energy can be transformed from one form to another as shown in the change from PE to KE and vice-versa

21. PE+ ME = KE

22. Basic Forms of Energy Hinulugang taktak WATERFALLS

23. Basic Forms of Energy KE PE TOP AS IT FALLS

24. PE KE

25. When raised to vertical position A, the boy gains maximum gravitational PE. When released from position A, PE is transformed partially into KE until it reaches point B where the KE is maximum. The PE at A is converted into KE at B. As the swing moves from point B to C, the KE decreases while the PE increases until it reaches point C. The PE at points A and C are equal.

26. PE KE

27. An engine pulls the roller coaster up to the top of the first hill or loop to attain a maximum PE. Then, it falls down on the track on its own. It moves as a result of interchange between PE and KE.

28. Do you understand Class?

29. Quiz

30. Identify the following whether it is kinetic or potential energy.

31. Moving cars on a highway QUESTION 1

32. Water stored in a dam QUESTION 2

33. Book placed on a shelf QUESTION 3

34. Stretched rubber band released QUESTION 4

35. Person standing on top of a hill QUESTION 5

36. ANSWERS Kinetic Energy Potential Energy Potential Energy Kinetic Energy Potential Energy

37. Try this background for online class. *Please delete this section before downloading.

38. Press these keys while on Present mode! B for blur D for a drumroll O for bubbles U for unveil C for confetti M for mic drop Q for quiet 0-9 Any number from for a timer