1. 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

2. 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

3. Year at University 1.1 st year 2.2 nd year 3.3 rd 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

4. 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

5. Mechanics and Intuition 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 A sheet of paper and a golf ball are released at the same time from the same height, roughly 2m above the ground.

6. 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.

7. Motion in one (spatial) dimension Spatial dimension objectdimensionSI unit d = 0point d = 1linelength Lm d = 2planearea L 2 m2m2 d = 3(3-d) spacevolume L 3 m3m3 Example for 1-d motion: Walking on a row of floor tiles.

8. Average speed and velocity for 1-d motion 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.

9. 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