Main Idea: What is a Force What is a Force? How do Forces Combine?

1. Your Completed outline should look like this. Main Idea: What is a Force What is a Force? How do Forces Combine? FORCES ACTING IN THE SAME DIRECTION FORCES ACTING THE OPPOSITE DIRECTION What Happens to an Object When Forces Are Balanced? What Happens to an Object When Forces are Not Balanced? MOVING OBJECTS NONMOVING OBJECTS DIRECTION OF MOVEMENT

2. Really Reading Notes • Volunteer Read, pg 169 • “Before You Read” • These are the questions you should be able to answer by the time we finish reading • Volunteer Read, pg 169 • First paragraph of “What is a Force” • What would you underline & why • Nothing • This is to get you thinking about how you have heard the word “force” used before

3. Really Reading Notes • Volunteer Read, pg 169 • Second paragraph of “What is a Force” • What would you underline? • We’re only asking the question • Do NOT underline anything YET • I would underline • force is a push or a pull • direction • magnitude • newton • unit

4. Really Reading Notes • Volunteer Read • Third paragraph of “What is a Force” pg 169 • What would you underline? • We’re only asking the question • Do NOT underline anything YET • I would underline • act on • objects around us • can see

5. Really Reading Notes • Volunteer Read • Fourth paragraph of “What is a Force” pg 169 • What would you underline? • I would underline • can not see

6. Really Reading Notes • Volunteer Read • Fifth paragraph of “What is a Force” pg 169 • What would you underline? • I would underline • when the forces • are balanced • object does not move

7. Do It ! ! ! Really Reading Notes • Skip 1 line on your sheet of paper • Mark 3 columns on your paper • Title the first “What I already know” • Title the second “Interesting Facts” • Title the third “What I still don’t Understand” Going to . . . .

8. What Happens to an Object When Forces are Not Balanced? MOVING OBJECTS NONMOVING OBJECTS DIRECTION OF MOVEMENT What I Still Don’t Understand What I Already Know Interesting Facts

9. Really Reading Notes • How would you use the words you have underlined on page 169 to make statements about what you have read? • I would write: • Force is a push or pull with direction and magnitude • Has units of Newtons • Act onobjects around us in ways that we can and can notsee • When the forcesare balanced the object does not move

10. Really Reading Notes • How would you classify the 1st statement? • Force is a push or pull with direction and magnitude • “Already Knew” column? • “Interesting Fact” column? • “Still don’t understand” column? Write this statement in the correct column on your RRN paper.

11. Really Reading Notes • How would you classify the 2nd statement? • Has units of Newtons • “Already Knew” column? • “Interesting Fact” column? • “Still don’t understand” column? Write this statement in the correct column on your RRN paper.

12. Really Reading Notes • Do your columns need to have an equal number of statements? • No • Which 2 columns will probably have more? • “Already Know” • “Interesting Facts” • “Still Don’t Understand” may only have 1 or 2 statements for the whole reading assignment

13. Really Reading Notes • How would you classify the 3rd statement? • Act onobjects around us in ways that we can and can notsee • “Already Knew” column? • “Interesting Fact” column? • “Still don’t understand” column? Write this statement in the correct column on your RRN paper.

14. Really Reading Notes • How would you classify the 4th statement? • When the forcesare balanced the object does not move • “Already Knew” column? • “Interesting Fact” column? • “Still don’t understand” column? Write this statement in the correct column on your RRN paper.

15. Really Reading Notes • From the section ”What is a Force” • Are there any things that you “Still Don’t Understand” ? • If there are • Write the statement in this column • I’ll be able to answer the question & help you learn

16. Really Reading Notes • Turn to page 170 • Volunteer Read • “How Do Forces Combine” • Underline • more than one force acts on an object • result is • combined effect • net force

17. Really Reading Notes • How would you use the words you have underlined in this section to make statements about what you have read? • more than one force acts on an object • result is • combined effect • net force • I would write these as: • A net force is when more than one force acts on an object • The result is a combined effect

18. Really Reading Notes • How would you classify these statements? • A net force is when more than one force acts on an object • The result is a combined effect • “Already Knew” column? • “Interesting Fact” column? • “Still don’t understand” column? Write these statements in the correct column on your RRN paper.

19. Really Reading Notes • Those who have already demonstrated you can make RRN • Have the choice of working independently • Or continuing to work with the group to help you understand what to do • Group by tables if you want to • If you finish early • Do the margin questions for extra credit • Do the questions on page 173 for extra credit

20. Really Reading Notes • Volunteer Read • “Forces Acting in the Same Direction” pg 170 • Underline • forces • in the same direction • add • Work as a table group • Use the words you have underlined to make statements about what you have read • I would write: • Forces going in the same direction always add

21. Really Reading Notes • How would you classify this statement? • Forces going in the same direction always add • “Already Knew” column? • “Interesting Fact” column? • “Still don’t understand” column? Write your statement in the correct column on your RRN paper.

22. Really Reading Notes • Volunteer Read • “Forces Acting in the Opposite Directions” pg 170 • Underline • forces • in opposite directions • subtract • direction • net force • same as • the larger force • Work as a table group • Use the words you have underlined to make statements about what you have read

23. Really Reading Notes • How would you classify your statements? • Forces going in opposite directions always subtract • Net forcedirection is the same asthe larger force • “Already Knew” column? • “Interesting Fact” column? • “Still don’t understand” column? Write your statements in the correct column on your RRN paper.

24. Really Reading Notes • From the section ”How Do Forces Combine” • Are there any things that you “Still Don’t Understand” ? • If there are • Write the statement in this column • I’ll be able to answer the question & help you learn

25. Really Reading Notes • Volunteer Read • “What Happens to an Object When Forces Are Balanced?” pg 171 • Underline • not moving • static • balanced forces • act • on • static object • balanced • no change in • motion • net force is 0N • tension force • pulled or stretched • compression force • pushed or squeezed

26. Do It ! ! ! Really Reading Notes • Work with your shoulder partner • Use the words you have underlined to make statements about what you have read • Then write the statements in the correct column on your RRN paper Going to . . . .

27. Really Reading Notes • For your homework • Complete your RRN for to the end of page 172 • Due on Friday, 1/15/10 • For extra credit • Do the Margin Questions • Answer the questions on page 173 Going to . . . .