Physics 105 spring 2010 Anna Karelina Office: CR 141 email: akarelin@glendale.edu Website: College Physics, V.1, 8th edition, by R. A. Serway et al + Students Solution Manual & Study Guide, V.1, by J.R.Gordon Conceptual Physics by Paul G. Hewitt - recommended

Lectures Lecture discussions Homework worth 4 points. Think on your own Discuss with your group Record your group's thoughts on whiteboard Be ready to explain the answer Quiz Each quiz will be graded on a scale of 0 to 4 points: 0 if the questions or problems are not attempted. 1 if the questions or problems have major omissions and/or conceptual errors. 2 if a reasonable attempt was made. 3 if there are small errors 4 if the answer is correct Homework worth 4 points.  Each problem will be graded on a scale of 0 to 2: 0 if the questions or problems are not attempted. 1 if the questions or problems have major omissions and/or conceptual errors. 2 if a reasonable attempt was made, making clear how you approached the problem and how you obtained the results Two additional points will be an effort grade based on the completeness and clarity of the rest of the problems.

Grade policy 87-100 = A 73-86 = B 60-72 = C 50-59 = D FOUR TESTS Two Midterm Tests are equal to the Final FINAL EXAM On the first page of your bluebook you can write a summary of the theory and procedures BLUE BOOK Final Exam 30-35%; All Tests about 65%; Homework 5%, Quiz 5%, Lab 20 %, SI 5% GRADE COMPUTATION

Mathematics Trigonometry Vectors Functions sin, cos, tan, Pythagorean theorem Definition Components Adding and subtracting Vectors Variables: independent, dependent Linear, Quadratic and Inverse proportionality Coordinate system and Graphs Functions

Trigonometry a2 + b2 = c2 c b a a b ? c c a b ? c c b a ? a b ? 1 β sinα = b c a c sinβ = ? α cosα = a c b c a cosβ = ? tanα = b a b a tanβ = ? (sinα)2 + (cosα)2 = 1 ?

Vectors quantities that have a size and a direction Vectors are symbolized with arrows. y (a, b) b The size of a vector is a number and so is the direction. A y-component opposite side α http://id.mind.net/~zona/mstm/physics/mechanics/vectors/components/vectorComponents.html x-component adjacent side a x

Vectors components a - ? b - ? c = 10 b a a = b = (a, b) 45° y-component opposite side a = b = 45° a http://id.mind.net/~zona/mstm/physics/mechanics/vectors/components/vectorComponents.html x-component adjacent side

Vectors Addition and Subtraction C a + b b a B A http://id.mind.net/~zona/mstm/physics/mechanics/vectors/introduction/introductionVectors.html http://www.physics.uoguelph.ca/tutorials/vectors/vectors.html a B A

Vectors A B A = B A and B are equal if they have the same magnitude and direction A vector having the same magnitude as A but in the opposite direction to A is denoted by -A A -A http://id.mind.net/~zona/mstm/physics/mechanics/vectors/introduction/introductionVectors.html http://www.physics.uoguelph.ca/tutorials/vectors/vectors.html

What is the length of the dotted line? The solid line has length A and makes an angle  with the negative y-axis. What is the length of the dotted line? y A cos A sin A tan sin/A cos/A x A θ

Three vectors are as shown. Which vector is ? B A C Black: None of these! Red Blue Green Purple

Problem Solving Read. Visualize and translate. Simplify. Represent physically. Represent mathematically. Solve. Evaluate the result.

Functions and Variables Algebra Physics 3x + 5 = 2 y = 2x - 3 S = v t unknown dependent distance independent speed time You drive a car from city A to city B. How position of the car changes with time? How fast should you drive to arrive at city B at time t? How duration of the trip depends on your speed?

Homework (due Friday) College Physics, by R. A. Serway et al. Read 1.3 Dimensional Analysis (p.5) Answer Multiple Choice Questions: #2 Problem: #3 Dimensional analysis