PHYSICS 103 LECTURE 1 8262003 PHYSICS 103 Lecture

PHYSICS 103 LECTURE 1: 8/26/2003

PHYSICS 103: Lecture 1 Agenda for Today: • • Review of syllabus Overview of course material Basic math review Units and unit conversions

Advice How to do well in this class: • Attend the lectures and ask questions • Read the book before coming to class • Study the material after each class • Complete sample exercises, questions, and problems in chapters. • Do the assigned homework • Take the self-tests in class I give before each exam • Don’t cram • Work in groups • Come to office hours or get a tutor if you are having trouble

Math Expectations • Algebra Solving for an unknown The quadratic formula • Basic Geometry and trigonometry Triangles Trigonometric functions

Solving for an Unknown Solve for x:

The Quadratic Equation a, b, and c are constants (numbers) Solution:

Triangles • Sum of all angles in a triangle is 180° • Pythagorean theorem For any right triangle: c b 90° a

Trigonometric Functions c b 90° a

Units and Unit Conversions SI Units • Length will be measured in meters (m) • Mass will be measured in kilograms (kg) • Time will be measured in seconds (s)

Useful Conversion Factors • • 1 inch = 2. 54 cm 1 m = 3. 28 ft 1 mile = 5280 ft 1 mile = 1. 61 km

Practice Unit Conversions: • How many seconds is an average lifetime? How many days? • How many seconds are you asleep? How many days? • If you go 60 miles hour, how many feet per second? How many meters per second?

HW Assignment: • Review Syllabus • Read Chapter 1