Go to: Course homepage, Lectures

Lecture: 2

Chapter 1

• Vector: 3D, 3-components, it has 3 numbers. Scalar: One number.
• Magnitude, unit vector
• SI units: kg, m, s.
• Average velocity: 1D, 2D and 3D.
• Average velocities for two different v(t)s
• Updating the position
• From average velocity to instantaneous velocity
• Acceleration:

o Definition: Change of velocity per unit time.

o From average acceleration to instantaneous acceleration.

o Two parts in change of velocity vector

1. Change of magnitude (pushing along direction of motion)

2. Change of direction (pulling perpendicular to the direction of motion, a seed concept discussed in detail in chapter 5)

To do list:

· You need to know the basic content of the firstday handout: General policy of this course. Toward the end there is where you can check your lab schedule. No lab this week.

· Before Monday class you should have read through chapter 1. You should have about to complete ch1-h1, start working on ch1-h2. Read the text, work through questions in the book.

· Seek for help if you have difficulty. Use TA and LA resources. Come to my office hour or send me an email if you have concerns about this course.