Science 6.ttttttttttttttttttttttttttpptx

Hraduate

1. House Rules 1 4 3 2 Sit Properly. Give your best and keep smiling. Listen carefully and participate. Do not talk to your seatmate.

2. READY CLAP!

3. “May the FORCE be with you”

4. SUPERSTAR Clap

5. Force

6. FORCE - is a push or pull that starts, stops, or changes the direction of an object.

7. FORCE -it is the action exerted by a body on another, which is mani - fested in its motion.

8. Does the force can be frictional? -the force can be frictional that causes the object that moves along a surface to slow down and stop. -it is a force that opposes motion between two surfaces sticking or touching together.

9. Friction - is the forces which opposes the motion of the objects over another.

10. PHYSICS LAB

11. Static Friction - is defined as the frictional force that acts between the surfaces when they are at rest with respect to each other.  

12. Static Friction examples: The clock hang on the wall. The fluorescent lamp on the ceiling.

13. 2. Sliding Friction - occurs when two solid surfaces slide over each other and a type of frictional motion between two surfaces in contact.

14. 2. Sliding Friction examples: Ice skating Ballet Dancing

15. 3. Rolling Friction sometimes called a resistance friction or rolling drag, it is the force resisting the motion when a body rolls on a surface .

16. 3. Rolling Friction examples: Riding a scooter Pushing carts

17. 4. Fluid Friction -is the force that resists the move- ment of a solid object through a fluid (liquid or gas)

18. 4. Fluid Friction example: A boat cruising.

19. Gravity - is a force that pulls object towards the ground.

20. Sheet of Paper – Crumpled Paper The sheet of paper falls slowly because of air resistance. The surface area of the sheet of paper is greater than the crumpled one. The surface area of the sheet of paper is affected by the air and causes it to drop slowly. The crumpled paper has a smaller surface area, which is not affected by air so it moves faster.

21. Have you ever ridden a bicycle in going up a hill or mountain? You find it difficult to go upward because you are going against gravity. Gravity is pulling you down and you need to apply greater force for you to accelerate. You need to apply great force to pedal the bicycle for you to overcome the gravity and able to go up.

22. But when you go downhill, it will be easy to accele -rate because gravity is pulling you down. You don’t need to pedal to be able to go down. Gravity pulls you downward. You don’t have to exert force to move because the wheels of the bicycle automatically roll because it is pulled by the gravity.

23. THINGS TO REMEMBER: 1. Gravity imposes a constant acceleration on all objects.  2. All objects are accelerated by the gravity in the same way. 3. Air resistance affects the movement of falling objects. 4. The greater is the surface area of a falling object, the greater is the air resistance that affect its movement.

24. What is our lesson for today? Friction and Gravity

25. “FORCE yourself to SMILE, WINK, LONELY and CUTE”

26. If your answer is STATIC FRICTION- FORCE yourself to SMILE If your answer is SLIDING FRICTION- FORCE yourself to WINK If your answer is ROLLING FRICTION - FORCE yourself to be LONELY If your answer is FLUID FRICTION- FORCE yourself to be CUTE.

27. 1 The pillow lying on the chair. SMILE

28. 2 Rolling of the log on the ground. LONELY

29. 3 Sliding the box on the floor. WINK

30. 4 Skydivers falling down. CUTE

31. 5 The laptop on the table. SMILE

32. Evaluation STATIC FRICTION ROLLING FRICTION SLIDING FRICTION FLUID FRICTION                         A. Direction: G ive 3 each example of the 4 kinds of friction using a clean sheet of paper.

33. Evaluation B. Direction: What are the forces of the parachute acting on the ground? Use 2-3 sentences only. Put it on a clean sheet of paper.

34. Assignment: Direction: Illustrate the flow of friction and gravity using a short bond paper.

35. Thank you, GRADE 6 - Teacher Joyce Ann Returia