1. Agenda 1) Warm-Up 5 min 2) Free-Fall Acceleration Due! 3) Pick-Up Graded Work Green 4) Org. Green Folder 10 min 5) Purple 5) Purple Formula Sheet 5 min 6) Lab Procedures 10 min 7) Bugso-Copter Lab 45 min 8) Review Sheet Qs 20 min 09 -27- 11 9.8 m/s 2 Vf=Vo+gt

2. Lab Partner Read Procedures & Questions Use supplies to design experiment/ Bugso- Copter Use notes for assistance Graph+Qs LAB DUE TODAY!!

3. Free Fall Why does an object fall to the ground when dropped? GRAVITY Gravity pulls objects towards the Earth at an acceleration 9.8 meters/sec/sec (m/s 2 ).

4. Free Fall: How Fast Elapsed time – the time that has passed since the beginning of the fall. In free fall, an object accelerates at a rate of 10 m per second every second

5. Free Fall: How Fast To calculate velocity in free fall: velocity = acceleration X time or v=gt Remember: g= acceleration due to gravity

6. Free Fall: How Far How fast something falls is different from how far it has fallen

7. Free-Fall: How Far? To calculate distance fallen: distance=1/2g X time 2 or d=1/2gt 2

8. Elephant VS Feather With no other resistance, they both fall with the SAME ACCELERATION: 10 m/sec/sec

9. But we all know the elephant would land first. Why? Answer: AIR RESISTANCE Air resistance alters the motion of falling objects by adding additional forces.

12. DUE TODAY: Free-Fall Notes (KEEP) DUE NEXT CLASS: Free Fall Acceleration WS Test Review Sheet Bring Calculator! “In all things of nature there is something of the marvelous.” Aristotle

13. In front of dividers: Homework chart (orange) Formula chart (purple) Syllabus Lab Safety Rules Coupon (green) Notes/Handouts Acceleration notes Distance & Displacement Notes II Distance & Displacement Notes I Physics Vocab. Chart Sig. Fig Handout Linear Motion Notes “About Science” Notes Quizzes Safety Quiz Speed/Velocity Quiz Daily Work Linear motion reading assignment Writing a hypothesis All homework assignments Labs Distance & Displacement Lab Toy car lab Misc. Lose papers