# 1.3 Linear Motion X ```09 -27- 11
Agenda
HOMEWORK CHECK
*Calculator
*Orange homework chart
*Free Fall Acceleration WS
 1) What is the value of “g”? 9.8 m/s2
 2) True or False: What is formula for
final free-fall velocity when Vo is given.
Vf=Vo+gt
1) Warm-Up
5 min
2) Free-Fall Acceleration Due!
4) Org. Green Folder 10 min
5) Purple Formula Sheet 5 min
6) Lab Procedures 10 min
7) Bugso-Copter Lab 45 min
8) Review Sheet Qs 20 min
•Lab Partner
•Use supplies to design experiment/ BugsoCopter
•Use notes for assistance
•Graph+Qs
•LAB DUE TODAY!!
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?
AIR RESISTANCE
Air resistance alters the
motion of falling
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 &amp; Displacement
Notes II
•Distance &amp; Displacement
Notes I
•Physics Vocab. Chart
•Sig. Fig Handout
•Linear Motion Notes
Quizzes
•Safety Quiz
•Speed/Velocity Quiz
Daily Work