1. WITH & WITHOUT A NET PART 2 NET FORCES

2. ENTRY TASK: In a moment we will take a Quiz. What information are you most confident about? What information are you least confident about?

3. TURN IN: Revised SFA#1 (Arrayana, Preston, Bianca, Lizzy, Conner, Makena, Tayer, Phyness, Antonio, Jules) Reading Summaries (pg 43-48)

4. QUIZ Good Luck! Shhhh… No Talking <3

5. WITH AND WITHOUT A NET Review Introduction

6. MODELING PARACHUTES As the coffee filter falls, Does the coffee filter speed up? Slow down? Have constant velocity? If so, when?

7. CLASS OBSERVATIONS: WITH MOTION DETECTORS

8. GOING TERMINAL Forces on the person determine the velocity of the person Forces are balanced – velocity is constant Forces are not balanced – velocity is changing

9. BUT I THOUGHT FORCES WERE ALWAYS EQUAL?!?!? Action – Reaction Pairs are always equal Every object has many Action – Reaction pairs acting on it at any time. So far, we have only examined action – reaction pairs

10. WHEN DO OBJECTS MOVE? Objects move when the forces acting ON the object are not equal. To learn about motion we only look at the forces ON the object (we ignore the forces caused by the object)

11. COFFEE FILTER DIAGRAMS As a Class, Coffee filter w/o paperclips With a partner, Coffee filter w/ 6 paperclips

12. HOMEWORK: Read & Summarize Conceptual Physics pages 48-53 (sections 4.5 – 4.7) Q 3 A, B, C (page 6 of With or Without a Net)