Welcome to Physics 1010: The Physics of Everyday Life

Instructor: John Bohn

Web: http://www.colorado.edu/physics/phys1010

Instructor: John Bohn Teaching assistant: Megan O’SadnickLearning assistants: Ruth Shewmon Tara Drake  

What you will need: Text – How things work; the physics of everyday life, L. Bloomfield 3rd editionClicker – bring to class everyday. Available in the bookstore Cost: $37.50Calculator – bring to class everyday.

Prerequisites:  High school algebra. The class will not use trigonometry, but will use algebra frequently as well as working with graphs and scientific notation.

Wait-listed? Don’t worry. Do all work, and will be allowed in.

Q. What is the point of this class?

A. Understanding how world around you behaves.Physics principles- explain, let you predict future (what will happen)!

Very specific learning goals.(see syllabus)Explain, predict, understand howtested by experiment:Motion, fluids, electric charges, electromagnetic waves…

Presented in terms of stuff around you:cars, flashlights, microwave ovens, radios, light bulbs, water systems, …

all sorts of other wonderful stuff to help you…

1. Wonderful website2. Clickers3. Online simulations (physics games).4. Online homework5. Problem solving sessions.6. In-class experiments7. Fancy powerpoint slides

Physics 1010 website, source of all knowledge!http://www.colorado.edu/physics/phys1010

Home PageSyllabus (Complete)

Weekly Reading AssignmentsWeekly Homework Assignments

Course Calendar *Lecture Notes (posted after class)

Learning GoalsHomework Solutions

Exam Reviews and Answers All the Information Needed for 1010

Logical Approach for Problem SolvingSupplementary Bloomfield Material

Help Room ScheduleDepartment of Physics Home Page

Physics links/downloads

read!!

Sections 1.1 and 1.2For Thursday

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iClicker

You will use the iClicker in some of your future classes.

Your clicker must be registered (see website).

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Clickers

• Everyday: swap clicker code to BA• Wait for 1st clicker question to open• Hold down On/Off Switch 4 seconds• Flashing blue light: hit B A • Type in Answer.

you’re set for rest of class period

• DO NOT TURN OFF CLICKER FOR CLASS (o.w. repeat above for any new clicker question)

QuickTime™ and aTIFF (Uncompressed) decompressor

are needed to see this picture.

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Clicker question

Do you have your clicker here today?

a) yes

b) no

c) 1492

d) The Gettysburg Address

e) I think so, Brain, but where are we going to get a trained octopus this time of night?

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Have you used clickers in a prior class?

• A – Yes

• B – No

You are NOT locked in to your first choice. Final answer entered will be

the one accepted/graded.

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Your iClicker

Put your name and contact information on your clicker so if you lose it, there is a chance it will be returned.

You can put your contact information on a piece of tape on the clicker if you plan to return the iClicker in the future

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Your iClicker

Use ONLY your iClicker!

Responding with another students iClicker is a violation of the Honor Code and WILL be reported.

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Clicker grading

• Two points for showing up/clicking

• 3 points for reading quiz

• One question/lecture will be graded

We will start keeping score on Thursday!

Recall: reading assignement

Student interest survey-- Why are you in this class?

a) Just liked physics.

b) Satisfies science requirement and physics not as bad as other choices.

c) Hate physics, but only class computer would let you in

d) Heard Prof. Bohn was awesome.

e) Other?

How do you think that you learn physics best?

a. Listening to lecture

b. Reading the textbook

c. Doing the homework

d. Discussing physics with others

e. Other

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Every student learn everything!

If it’s not important to learn, we took it out.

Course Goal:

Guiding principles: (basis for how course is run)1.People understand concepts better by seeing them in action and thinking

about them than by passively listening.

2. Understanding physics (& solving problems that develop understanding) is a learned skill, like cooking, or playing basketball. Takes time, effort, and practice.

3. People learn best by thinking about topics and discussing them with others.

4. Students learn most when they take the responsibility for what is learned.

We cannot teach you physics!

Physics is not collection of facts.Is way of thinking. Only you can teach yourself to think! Analyzing, applying concepts, solving problems.

We can provide you with content, demonstrations, problems,guidance, organization, etc. to help you learn.

Reward activities and efforts conducive to your learning(grade)

We think it is important and useful for you tothink/apply ideas to the real world.We do work to try and help you learn.But also takes work on your part!

Do everything, and it’s almost impossible to get lower than B. (< 50% =F)Total in-class and weekly homework count the most!Grade depends most on showing up for class, doing reading, and turning in homework every week.

If you will miss classes and not turn in homework now and then,Drop now! Save both of us pain.

Classwork & Grading: Grade based on total number of points earned.

In-class Reading Quizzes 3 pts x~13In-class participations (Clickers) 2-4 pts per class x 30Homeworks ~15-20 pts x~14Hour Exams 30 pts x2Final Exam 60 pts x1

Your lowest homework, lowest in-class participation, will be dropped.

To learn physics and do well in this class, I expect to spend ?…… working on physics outside of class.

a. Less than 2 hours per week

b. 2-4 hours per week

c. 4-6 hours per week

d. 6-8 hours per week

e. 8+ hours per week

right answer- c. On average 4-6 hours. Means more some weeks. Students who think this toomuch hate class; ones who think it’s ok, love the class.

HomeworksHomeworks • Normally due Fridays at midnight. • Follow link on course website to CULearn. Online

submission• Need username and Identikey password

Homework #1 to be posted to-day. • Problem Solving Sessions Thurs/Friday• HW#1 is due Friday (8/27) at midnite.

Office Hours & Problem Solving Sessions

Phys help room

Phys1010 problem solving sessionin help room. Just look around.

Enter throughG2B90

Regular Weekly Hours (Starts Thurs.)

Hours TBD; check with syllabus

Homework is too hard to do alone, butok & learn lot when work together.We will help interactions,coach,We will NOT give answers.

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Collective Work vs. Independent work..

What is authorized:- working with others to make sense of questions- collectively sorting out the answer (explaining reasoning)- writing up your own solution in your own words

What is NOT authorized:- telling students the answer- representing someone else’s work as your own

Group Work Encouraged(in fact, hopefully, necessary)

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The Honor Code

What is Physics?

Covers lots of stuff. But a big part is how things move. In this class:

•Objects (e.g., baseballs)•Fluids (air, water)•Heat•Electricity (moving charges)•Electromegnatic waves (radio)•Light

Motion

Understand motions around us: balls, cars, bikes, people, atoms ….

But before we get to how or why, we need to be able to describe motion, using words, graphs, equations.

What do you need to describe the motion of an object?

• A) where it is

• B) where it’s going

• C) both where it is and where it’s going.

• D) where its been

Answer: c. Need both position and velocity.

Measuring position

Unit: meters (abbreviation m)

Meter sticks; sonar

Human Motion (& using graphs)Demo 1: Sketch distance (position) vs. time graph for 1) Person moving away from origin (motion detector) at steady velocity on left. 2) Person moving toward origin (mot. det.) at steady velocity on right.

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Human MotionDemo 1: Sketch distance (position) vs. time graph for 1) Person moving away from origin (motion detector) at steady velocity on left. 2) Person moving toward origin (mot. det.) at steady velocity on right.

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A B

C D

Human MotionDemo 1: Sketch distance (position) vs. time graph for 1) Person moving away from origin (motion detector) at steady velocity on left. 2) Person moving toward origin (mot. det.) at steady velocity on right.

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0feet

10-10

Answer is C

away toward

Speed

If you drive 60 miles/hour, that’s a speed.

It’s also 1 mile/minute

It’s also 1/60 mile/s

“Physics” units: meters/second (abbreviation m/s)

There are 1600 meters in a mile. If you drive 60 miles/hour, how fast is this in m/s?

a) 60 m/s

b) 160 m/s

c) 27 m/s

d) 270 m/s

e) 1600 m/s

How does this work?

hr

mi60

mi

m

1

1600

min60

1hr

s60

min1

sm /27