That s how we roll. Physics : General Physics, Part 1. Agenda. About Me. Administrative Stuff

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Physics 111-01: General Physics, Part 1 Agenda Today: Syllabus overview, homework registration, administrative stuff Wednesday: Units, sig

Best place to ask questions (besides during class) is office hours Tuesdays 11AM-3PM, MW 2-3PM, Thursdays by appointment Best way to contact me

edu put Phys 111 in the subject line Enrollment Wait List Prerequisites Administrative Stuff Lab (Physics 112) must be taken concurrently

1 Physics : General Physics, Part 1 Agenda Today: Syllabus overview, homework registration, administrative stuff Wednesday: Units, sig figs, measurement Reading for Friday: Chapter 1 That s how we roll. About Me My office is in Science 356 Come say hello! Best place to ask questions (besides during class) is office hours Tuesdays 11AM-3PM, MW 2-3PM, Thursdays by appointment Best way to contact me is jfielder@sfsu.edu put Phys 111 in the subject line Enrollment Wait List Prerequisites Administrative Stuff Lab (Physics 112) must be taken concurrently Textbook & Mastering Physics Course ID: fielder week free trial period Introductory assignment due on Friday! Register before Feb. 8 th or you will be dropped from the class. Etext, access code, free trial period for Mastering Physics Phys111S16.html 1

2 Goals For This Class Help you develop: A thorough understanding of the central concepts of physics The ability to solve complex problems using physics concepts, algebra, and trigonometry Participation 10% of your final grade is class participation Short writing assignments Group activities Voting If you miss class, you cannot make up the participation credit for that day. 15 (about 1/week) are collected, need 10. Make class attendance a firm priority. Homework 2 assignments per chapter: one on reading, one problem set Problems from textbook & conceptual questions Working in groups is definitely encouraged, but the work you turn in must be your own. Homework is 20% of your final grade HOMEWORK IS PRACTICE FOR EXAMS Exams 3 midterms (20% each) and a comprehensive final (30%) multiple choice and some short problems Lowest of the midterm exams is dropped Exam dates are not flexible DO NOT MISS EXAMS! THERE ARE NO MAKEUPS! Grades Syllabus Questions? Homework 20% Participation 10% Midterms (best 2 x 20% each) 40% Final Exam 30% Bring signed Student Contract (last page of syllabus) to class on Monday. I do not offer extra credit, but exams and overall grades may be curved. If you need to talk about your grade in detail, let me know. 2

same height at the same time, which one will reach the ground first? A. The bowling ball, because it has more mass B. The baseball, because it has less mass C.

3 Agenda Today: Chapter 1 (Sig Figs & Dimensions) Intro to Mastering assignment due Monday (register now!) Reading for Friday: Chapter 2 (can start CH 2 reading assignment on Mastering) Walker text is on reserve in the library under Phys 111 If a bowling ball and a baseball are both dropped from the same height at the same time, which one will reach the ground first? A. The bowling ball, because it has more mass B. The baseball, because it has less mass C. The bowling ball, because it is larger in size D. They will reach the ground at about the same time E. None of the above The Montillation of Traxoline It is very important that you learn about traxoline. Traxoline is a new form of zionter. It is montilled in Ceristanna. The Ceristannians gristerlate large amounts of fevon and then brachter it to quasel traxoline. Traxoline may well be one of our most lukized snezlaus in the future because of our zionter lescelidge. (attributed to the insight of Judy Lanier) The Montillation of Traxoline It is very important that you learn about traxoline. Traxoline is a new form of zionter. It is montilled in Ceristanna. The Ceristannians gristerlate large amounts of fevon and then brachter it to quasel traxoline. Traxoline may well be one of our most lukized snezlaus in the future because of our zionter lescelidge. Directions: Answer the following questions in complete sentences. Be sure to use your best handwriting. 1. What is traxoline? 2. Where is traxoline montilled? 3. How is traxoline quaselled? 4. Why is it important to know about traxoline? A Commonly Held Incorrect Model of a Student s Conceptual Framework A Commonly Held Incorrect Model of Teaching and Learning tabla rasa 3

of Length) Everything is based on the meter (m) 1 kilometer (km) = 1000 m = 10 3 m 1 centimeter (cm) = 0.01 m = 10-2 m 1 millimeter (mm) = 0.001 m = 10-3 m 1 nanometer (nm) = 0.

4 Physics can be BIG! SI Units: The Système International or mks Length: meter (m) Mass: kilogram (kg) Time: second (s) Force: newton (N) Energy: joule (J) Current: ampere (A) Temperature: kelvin (K) Metric System (Units of Length) Everything is based on the meter (m) 1 kilometer (km) = 1000 m = 10 3 m 1 centimeter (cm) = 0.01 m = 10-2 m 1 millimeter (mm) = m = 10-3 m 1 nanometer (nm) = m = 10-9 m Why unit conversions are important! Good estimates: 1 meter is about 3.3 feet 1 inch is 2.54 centimeters (exact definition!) 5 miles is about 8 kilometers Units & Conversions Example: How many seconds are in a year? Scientific Notation & Significant Figures How precisely do we know a number? How many significant figures? All non-zero digits are significant Zeros are significant when between other non-zero digits after the decimal point and another significant figure can be clarified by using scientific notation Example: How many days are there in a year? 4

5 Dimensional Analysis It is often helpful to approach a problem by looking at the units involved Dimensions (such as length) can be expressed in many different units (centimeters, miles, microns, etc.) Example: how could we figure out the speed of an object? What would we need to know? Quantities in Motion Any motion involves three concepts Displacement (x, m) Velocity (v, m/s) Acceleration (a, m/s 2 ) These concepts can be used to study objects in motion Motion Basics How objects move through space and time Position: location in a coordinate system Displacement: change in position Δx = x f - x i Velocity: rate of change in position v = Δx / Δt Displacement & velocity are vector quantities: include a direction! Vector Basics Vectors are drawn as arrows in diagrams A vector quantity is written either in bold or with a small arrow over the top: v or v Ways to express vectors depend on the coordinate system Magnitude and angle: angle measured counterclockwise from x-axis Components: along x- & y-axes SOH CAH TOA: Use it, know it, it is your best friend for decomposing vectors! Example: A person runs northwest (exactly halfway between due north and due west) at a speed of 2 m/s 1. Define coordinate system and origin 2. Magnitude/angle version 3. Components version A bird flies 3.0 m due west and then 2.0 m due north. What is the magnitude of the bird s displacement? A. 2.0 m B. 3.0 m C. 3.6 m D. 5.0 m E. 6.0 m 5

6 Displacement Isn t Distance The displacement of an object is not the same as the distance it travels Example: Throw a ball straight up and then catch it at the same point you released it The distance is twice the height The displacement is zero Distance & Displacement Lecture- Tutorial Work with a partner or two Read directions and answer all questions carefully. Take time to understand it now! Come to a consensus answer you all agree on before moving on to the next question. If you get stuck, ask another group for help. If you get really stuck, raise your hand and I will come around. 6

That s how we roll. Physics 20: General Physics Part 1. Agenda. Administrative Stuff. About Me. Goals For This Class 1/16/14.

That s how we roll. Physics 20: General Physics Part 1. Agenda. Administrative Stuff. About Me. Goals For This Class 1/16/14. Physics 20: General Physics Part 1 Agenda Today: Syllabus overview, mechanics pretest Thursday: Units, sig figs, measurement Reading for Thursday: Chapter 1 Key ideas: Particle model, position & velocity,