Announcements:
1. Labs start in the second week of classes.
2. Diagnostic test on Friday, August 29.
3. No class on Monday, September 1,
Labor Day
4. PreClass quiz on WebCT available now,
due by 8pm on Tuesday, September 2
5. Homework is due in class on Wednesday,
September 3.
6. If you need help, come to my office hours
M W 10-11am, T Th 1-3pm
or send me email through WebCT
How did you come to class this morning?
1. On foot
2. By bicycle
3. By bus
4. By car
5. Other
How long did it take you?
• Less than 10 minutes
• 10 - 20 minutes
• 20 - 30 minutes
• 30 - 40 minutes
• More than 40 minutes
Year at University
1. 1st year
2. 2nd year
3. 3rd year or above
Calculus:
1.
I have passed Calculus I
2.
I have passed Calculus I and II
3.
I have passed Calculus I, II, and III
What is your (desired) field of study
•
Engineering
•
Natural Sciences
•
Education
•
Other
If you plan to be an engineer,
what is your (desired) discipline
1.
Biomedical Engineering
2.
Chemical Engineering
3.
Civil Engineering
4.
Electrical and Computer Engineering
5.
Mechanical Engineering
If you plan to be a scientist,
what is your (desired) discipline
1.
Biology
2.
Chemistry
3.
Computer Science
4.
Geology
5.
Physics
6.
Statistics
7.
Mathematics
Mechanics and Intuition
A sheet of paper and
a golf ball are
released at the same
time from the same
height, roughly 2m
above the ground.
Which object hits the ground first?
1. The golf ball
2. The sheet of paper
3. Both objects hit the ground
at the same time
4. Not enough information to decide
Now the paper is
crumpled up before
it is released.
Which object hits the ground first?
1. The golf ball
2. The sheet of paper
3. Both objects hit the ground
at the same time
4. Not enough information to decide
Motion in one (spatial) dimension
Spatial
dimension
object
d=0
point
d=1
dimension
SI unit
line
length L
m
d=2
plane
area L2
m2
d=3
(3-d) space
volume L3
m3
Example for 1-d motion:
Walking on a row of floor tiles.
Average speed and velocity for 1-d motion
average speed 
distance traveled
time elapsed
average velocity 
displacement
v
time elapsed
dimensions of velocity (and speed)
velocity  length  , SI units : m
time 
s
Note:
Speed is never negative.
Your speedometer shows a positive speed
even when you are driving in reverse.
The velocity for 1-d motion can be positive,
negative, or zero.
Announcements:
1. Labs start in the second week of classes.
2. Diagnostic test on Friday, August 29.
3. No class on Monday, September 1,
Labor Day
4. PreClass quiz on WebCT available now,
due by 8pm on Tuesday, September 2
5. Homework is due in class on Wednesday,
September 3.
6. If you need help, come to my office hours
M W 10-11am, T Th 1-3pm
or send me email through WebCT