WARM-UP:HOMEWORK CHECKPlace on your desk:

*Calculator*Orange homework chart

*Merrily We Roll Along Lab

1) What force on earth causes falling objects fall downward?

2) True or False: The less steep the incline, the smaller the acceleration.

Agenda1) Warm-Up 5 min

2) Lab + Graph Due!3) Test Review Handout4) Free Fall Acc. Notes 20 min

5) Formula Sheet 5 min

6) Free Fall Video 10 min

7) Free Fall Acc. Worksheet 30 min

8) Review Sheet 20 min

LEARNING GOALS: •Express and interpret relationships symbolically in accordance with accepted theories to make predictions and solve problems mathematically, including problems requiring proportional reasoning and graphical vector addition.

HOMEWORK DUE:Merrily we Roll Along Lab

09 -23- 11

gravity

True

ReviewQuiz Multiple Choice

Free FallWhy 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/s2).

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

Free Fall: How FastTo calculate velocity in free fall:velocity = acceleration X time

orv=gt

Remember: g= acceleration due to gravity

Free Fall: How Far

How fast something falls is different from how far it has fallen

Free-Fall: How Far?

To calculate distance fallen:distance=1/2g X time 2

or d=1/2gt2

Elephant VS FeatherWith no other

resistance, they both fall with the

SAME ACCELERATION:10 m/sec/sec

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.

Formula Sheet!

Pop Warm-up checkSept. 19/20

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

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 QuizDaily Work•Linear motion reading assignment•Writing a hypothesis•All homework assignmentsLabs•Distance & Displacement Lab•Toy car labMisc.•Lose papers

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