09 -23- 11
Agenda
HOMEWORK CHECK
Place on your desk:
*Calculator
*Orange homework chart
*Merrily We Roll Along Lab
 1) What force on earth causes falling
objects fall downward? gravity
 2) True or False: The less steep the
incline, the smaller the acceleration.
True
1) Warm-Up
5 min
2) Lab + Graph Due!
3) Test Review Handout
4) 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
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/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 Fast
To calculate velocity in free fall:
velocity = acceleration X time
or
v=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
or
d=1/2gt2
2
Elephant VS Feather
 With 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.
DUE TODAY:
• Free-Fall Notes (KEEP)
“In all things of nature there is something of the
marvelous.”
Aristotle
DUE NEXT CLASS:
• Free Fall Acceleration WS
• Test Review Sheet
• Bring Calculator!
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