1. Balanced & Unbalanced Forces Newton’s Laws of Motion
Chapter 9

2. Balanced & Unbalanced Forces
Lesson 2

3. Essential Question How Do Objects React To Forces?
How Do Forces Affect Motion?

4. Page 336

5. Balanced Forces
If the forces acting on an object are balanced, the objects motion will not change.

6. Unbalanced Forces
When the sum of all forces acting on an object is unbalanced, the objects motion will change.

8. Explain How the Objects Can Be Balanced and Unbalanced

9. Page 337

10. Net Force - Page
Combination of all the forces on an object.

11. Page 339

12. Home Learning Complete Lesson 2 Assess Your Understanding
Review & Assessment Page 349 #6-10
Vocabulary Lesson 2
Extra Credit: Magnet 2/24
Extra Credit: Gizmo #11 2/27

13. Newton’s Laws of Motion
Lesson 3

14. Essential Question How Do Objects React To Forces?
What Is Newton’s First Law of Motion?
What Is Newton’s Second Law of Motion?
What Is Newton’s Third Law of Motion?

15. Page 340

16. Newton’s First Law of Motion
An object at rest will remain at rest unless acted on by an unbalanced force.
An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

17. What does this mean?
This means that there is a natural tendency of objects to keep on doing what they're doing.
All objects resist changes in their state of motion.
In the absence of an unbalanced force, an object in motion will maintain this state of motion.

18. Page 341

19. Newton’s Second Law of Motion
Acceleration is produced when a force acts on a mass. The greater the mass the greater the amount of force needed.
FORCE = MASS x ACCELERATION

20. What does this mean?
Everyone unconsciously knows the Second Law. Everyone knows that heavier objects require more force to move the same distance as lighter objects.

21. Page 342

22. Page 343

23. Newton’s Third Law of Motion
For every action there is an equal and opposite re-action.

24. What does this mean?
This means that for every force there is a reaction force that is equal in size, but opposite in direction.
That is to say that whenever an object pushes another object it gets pushed back in the opposite direction equally hard. 

25. Page 344

26. Page 345

27. Guess Which Law of Motion
3rd Law
1st Law
2nd Law

28. Quick Question Quest
1. Who was the scientist who gave us the Laws of Motion? 2. How many Laws of Motion are there? 3. What is another name for the first law of motion? 4. Which law explains why we need to wear seatbelts? 5. Which law says that force is equal to mass times acceleration (F=MA)? 6. Which law says that heavier objects require more force than lighter objects to move or accelerate them? 7. Which law explains how rockets are launched into space? 8. Which law says that for every action there is an equal and opposite reaction?
Sir Isaac Newton 
Three 
Law of Inertia
First Law of Motion 
Second Law of Motion 
Second Law of Motion
Third Law of Motion 
Third Law of Motion 

29. Home Learning Complete Lesson 3 Assess Your Understandings
Review & Assessment Page 350 #11-15
Vocabulary Lesson 3
Extra Credit: Gizmo #11 2/27
Bring Roller Coaster Materials!