Newtons Law.pptx Science 8 2025 3 laws of motion

Science

1. Newton’s First Law – the Law of Inertia

2. A young Isaac Newton is sitting beneath an apple tree contemplating the mysterious universe. Suddenly –  boink!  -an apple hits him on the head. “Aha!” he shouts, or perhaps, “Eureka!” In a flash he understands that the very same force that brought the apple crashing toward the ground also keeps the moon falling toward the Earth and the Earth falling toward the sun: gravity.

3. Short Overview

4. Short Review Q1. What is a force? Q2. What is gravity and how does it affect our lives? Q3. Write a sentence using the words ‘gravity’ and ‘force’ to say how they affect common everyday situations.

5. Lesson Purpose and Intention

6. Lesson Purpose and Intention . Explain scientifically how forces affect the motion of objects, including the motion of small objects like golf balls and really large objects like the Earth and other planets .

7. Lesson Language Practice

8. BALANCED INERTIA TENDENCY EXTERNAL GRAVITY REMAIN UNBALANCED REST

9. WORDS AND ITS MEANING Balanced – equal in proportion Unbalanced- not fair or not equal Rest- no change in position Inertia – state of an object in motion or at rest Remain- stay in place Gravity – force that attracts a body towards the earth External- outer surface Tendency – possible to happen

10. Lesson Activity

11. Information about Inertia Newton’s First Law An object at rest will remain at rest until it is acted upon by an unbalanced force, and an object in motion will remain in motion unless it is acted on by an external force. A non-scientific meaning of Inertia: A tendency for an organization to do nothing or to remain unchanged.

12. 1. A shiny glass marble rolling over a smooth flat floor. The following are all examples of everyday situations that can be used to describe the Law of Inertia :

13. 2. A bicycle moving forward even after peddling is stopped. The following are all examples of everyday situations that can be used to describe the Law of Inertia :

14. 3. A drinking glass sitting on a table. The following are all examples of everyday situations that can be used to describe the Law of Inertia :

15. 4. Rolling a heavy tenpin ball straight down the center of a bowling alley lane. The following are all examples of everyday situations that can be used to describe the Law of Inertia :

16. 5. The motion of a heavy tenpin ball as it knocks the pins over . The following are all examples of everyday situations that can be used to describe the Law of Inertia :

17. 6. A golf ball sitting on a golf tee before the golfer hits it down the fairway. The following are all examples of everyday situations that can be used to describe the Law of Inertia :

18. 7. A house built in an earthquake zone just before it is destroyed by an earthquake. The following are all examples of everyday situations that can be used to describe the Law of Inertia :

19. 8. The motion of a hockey ball that is hit along the ground between two players. The following are all examples of everyday situations that can be used to describe the Law of Inertia :

20. 9. A spacecraft when it is cruising between the planets Earth and Mars. The following are all examples of everyday situations that can be used to describe the Law of Inertia :

21. 1. A shiny glass marble rolling over a smooth flat floor. 2. A bicycle moving forward even after peddling is stopped. 3. A drinking glass sitting on a table. 4. Rolling a heavy tenpin ball straight down the center of a bowling alley lane. 5. The motion of a heavy tenpin ball as it knocks the pins over. 6. A golf ball sitting on a golf tee before the golfer hits it down the fairway. 7. A house built in an earthquake zone just before it is destroyed by an earthquake. 8. The motion of a hockey ball that is hit along the ground between two players. 9. A spacecraft when it is cruising between the planets Earth and Mars. The following are all examples of everyday situations that can be used to describe the Law of Inertia :

22. . Q1. The word ‘remain’ is used three times in the information provided about Inertia. What is another word that means the same as ‘remain’? Q2. Which of the 9 examples describe objects that are at rest? Q3. What are the important differences between the Scientific and Non-scientific meanings of ‘inertia’?  LET’S ANSWER TOGETHER

23. Q1. The word ‘remain’ is used three times in the information provided about Inertia. What is another word that means the same as ‘remain’? ?? An object at rest will remain at rest until it is acted upon by an unbalanced force, and an object in motion will remain in motion unless it is acted on by an external force. A non-scientific meaning of Inertia: A tendency for an organization to do nothing or to remain unchanged

24. Q2. Which of the 9 examples describe objects 1. A shiny glass marble rolling over a smooth flat floor. 2. A bicycle moving forward even after peddling is stopped. 3. A drinking glass sitting on a table. 4. Rolling a heavy tenpin ball straight down the center of a bowling alley lane. 5. The motion of a heavy tenpin ball as it knocks the pins over. 6. A golf ball sitting on a golf tee before the golfer hits it down the fairway. 7. A house built in an earthquake zone just before it is destroyed by an earthquake. 8. The motion of a hockey ball that is hit along the ground between two players. 9. A spacecraft when it is cruising between the planets Earth and Mars. that are at rest? ?

25. Q3. What are the important differences between the Scientific and Non-scientific meanings of ‘inertia’? ?? SCIENTIFIC MEANING An object at rest will remain at rest until it is acted upon by an unbalanced force, and an object in motion will remain in motion unless it is acted on by an external force. NON-SCIENTIFIC MEANING A non-scientific meaning of Inertia: A tendency for an organization to do nothing or to remain unchanged.

26. Let’s Answer Some More

27. Q1. What is gravity and how does it affect objects? Q2. What forces are acting in Example 1. ‘A shiny glass marble rolling over a smooth flat floor.’? Q3. Choose one other example and describe the balanced and/or unbalanced forces that are acting in the example. You can use a labelled diagram to display your thinking as well ?

28. Lesson Conclusion

29. Question 1: 1. The focus of the lesson was on learning about how forces affect the motion of objects. How has the lesson helped you to describe forces?

30. Question 2: 2. Has the activity helped you to think about forces in everyday life? Which ones?

31. Question 3: 3. What did you enjoy about the lesson?

32. Question 4: 4. What is something you would like to learn more about in this topic?

33. REMINDER: Submit your worksheet.

34. NEWTON’S FIRST LAW OF MOTION LAW OF INERTIA

35. SOME COMMENTS ON NLC MATERIALS / LESSONS

36. *There is no materials for Science in the Intervention camp, hence, Science will be part of the Remedial class..