Unit Four Review

Below is a key for the review sheet.

You might also consider trying these questions from the Red Textbook
p169-173:  17, 18, 26, 32, 38, 49, 50, 52, 54
p133:  14-16
p146: 30, 34

Review Answers 2013 More Forces Unit

Gecko Friction

In some classes I mentioned that Geckos use frictional force to climb surfaces in a surprising way - not through surface irregularities and tiny hooks, but through electrostatic attractions.

Here is a link to a NOVA episode about it.  The gecko section starts at about the 11 minute mark.

http://www.pbs.org/wgbh/nova/tech/making-stuff.html#making-stuff-smarter

Circular Motion Links

Here are links to the physics tutorial pages on circular motion.  You'll want to read Lessons One and Two.

http://www.physicsclassroom.com/Class/circles/

Have you noticed that links to the UT website and the physics tutorial homepage are at the bottom of the right hand column of this blog?

Unit 4 - - More topics in Forces - Inclined Planes, Friction, Adding Forces, and Centripetal Acceleration

Goals
• Be able to add forces in two dimensions.
• Understand and apply conditions for equilibrium.
• Calculate the frictional force when given the coefficient of friction and vice versa.
• Determine the normal force, and the parallel and perpendicular components of gravity for inclined plane problems and solve for acceleration.
• State and apply equations for centripetal acceleration and force.
• Distinguish between the centripetal force and the fictitious centrifugal force.
• Analyze examples of circular motion in terms of Newton's three laws of motion.

Important Dates
Friction Lab : due Dec. 16
Homework: Nov. 20, Dec. 4,  and Dec. 11, all at 10:00 pm
Unit Test: Dec. 12 and 13

This unit corresponds to parts of chapter 6 and section 7.3 in the book.

Forces review packet key

More review questions and explanations can be found in ch. 6 of the red textbook and at the following link http://www.physicsclassroom.com/Class/newtlaws/

key

Force Unit

Goals

1.      Draw Force Vectors.

2.      Calculate Weight.

3.      Solve Problems with Net Force.

4.      Know that when an object is at rest or moving with constant velocity that F_net = 0 and all of the forces are balanced.

5.      Understand what terminal velocity is and how it is reached.

6.      Be able to explain why all objects in freefall have an acceleration of 9.8 m/s²

7.      Understand that forces are interactions between two things and that each object exerts an equal and opposite force on the other.

8.      Know Newton’s Three Laws of Motion by name.

In general, understand Newton’s 3 laws and apply them to explain motion.

Lab Due Date:  Nov. 6/7 

Homework due in the evening of Nov. 11 and Nov. 17

Test Date Nov. 19 and 20  

Lab 2 - Newton's Second Law

The form linked to below gives you the questions to answer in your next lab report.

Please copy the questions from it into your lab document and answer them.  Also insert the diagrams, data tables and graphs as requested.

https://docs.google.com/document/d/1HxInZrn-IwDish4SOKo0-T-9SGX3Z-hBWkaSAdIgyBU/edit?usp=sharing

If you have not already made a document for sharing lab reports with me, you may link to the original instructions here.

If you submitted your lab report via google docs last time, please make the new report the first thing in that document.

Remember to give me the ability to edit your document.

3 labs that scored 98

Exemplary Galileo Labs 2013 by Ethan Medley

Unit Three - Preview Reading

Unit Three - Newton's Laws of Motion

Please either preview chapter 6 in the textbook or read Lessons 1 and 2  (each has 4 parts) at the following link.http://www.physicsclassroom.com/Class/newtlaws/

Then do the the 6 questions in the new UT homework assignment.  Due Sunday night at 10:00.

Key concepts here are  inertia, force, mass vs. weight, and net force.  When you're reading, make sure you pay attention to what mass, weight and force are.  What are their units?  How are they different?    How do they relate to each other?  Also what is meant by net force and how is it applied in a problem?

One thing to keep in mind when doing the homework is that in question 4 when it says "free fall" this means that Gravity provides the only force.  No air resistance or anything else.

More two dimensional review

Answers are on the last page.Motion in 2 Dimensions Practice

Answer Key for Vector Review

Review Answers 2013

Motion in Two Dimensions Unit Overview

Unit Two – Vectors and Kinematics in Two Dimensions

Covers Sections 4.1, 4,2 and 7,2  or  continue reading from the links on the physics tutorial website http://www.physicsclassroom.com/Class/vectors/

Unit Goals:
1. Know that perpendicular vectors are independent
2. Add vectors graphically with parallelogram and head to tail methods.
3. Use trig and Pythagorean theorem to find resultant.
4. Break vectors into perpendicular components graphically and with trig.
5. Solve motion problems in 2D.

Test - Thursday and Friday Oct, 17,18

Homework due 10:00 pm Sunday the 6th, Sunday the 13th and Wednesday the 16th.

Vector Unit Prereading

Prior to going over this in class, try reading these three pages from the physics tutorial website or reading  chapter 4 from the textbook and answering the three on line homework questions on Quest (due Sun. night)

http://www.physicsclassroom.com/Class/vectors/U3L1a.cfm
http://www.physicsclassroom.com/Class/vectors/U3L1b.cfm
http://www.physicsclassroom.com/Class/vectors/U3L1c.cfm

Kinematics Review Key

Kinematics Review Key 2013

Reviewing for Kinematics Test on Tuesday

Be sure to review the post on this blog listing the unit 1 goals.  If you are uncertain about any of them be sure to ask in class.

If you are following along in the textbook, this unit corresponds to chapters 3 and 5.

The link to the right called the physics tutorial is also good  Here is a direct link to the pages on 1 D motion.

After the submission deadline, remember that you can look at the homework assignments and see all of the solutions.  This is always a good thing to do, if there were problems that you never got right.

On Thursday and Friday, I will be giving classes review packets.  While not required, these worksheets are great practice for the test.  Solutions for them will be posted on this blog.

On line lab submission

This year I would like students to submit their labs to me via google docs.

Please make a google account, and make a single google doc and share it with me.  All of your labs will go one this single document.  Please give me the ability to edit it so that I can add comments and insert my scoring rubrics.

Please use the naming format - lastname.firstname.physicsperiod____

Don't use my normal email to share it.  I made my google account back when pps emails went like this:

emedley@pps.k12.or.us

Installing Logger Pro on your home computer

As a Grant High School student you have the right to install Logger Pro on your home computer.  The following installation links will require a password to decompress.  You will need to get that password from me.


Logger Pro 3.8.6.1 with sample movies (Windows)
Link: http://www.vernier.com/d/kuie1
Password: 

Logger Pro 3.8.6.1 with sample movies (Mac OS X)
Link: http://www.vernier.com/d/tebas
Password: 

Fun graph matching game

http://www.theuniverseandmore.com/

Keep the graph within the green band. Get ice cream. Avoid meteors.

Be the first to find out what happens when you get through all of the levels.

Making a University of Texas Homework Account

Please go to this link and start an online homework account. Click on "get started" and then choose "I need a UT EID". In the next window choose "get a UT EID". After you submit your information it will send your ID code to your email account. With this code you will will sign in to my class and start the first assignment. You may proceed to sign in now or bring your EID code and password on Wednesday. On Friday we will log in as a class, I will start accepting your enrollment and we will start the first assignment.

This is how to sign in:
Return to the link above and log in.
You will then need to select a class based on a unique number. For Physics the unique number is 2232013. Enter the number and then select look up course info. Scroll down by clicking the arrow on the window that appears through the many other classes designated with that unique number until you find Physics (Grant High school 2013 Fall). It will probably be the only one. Select it and then select request enrollment.

I will have to admit you into the class. The next time you log in, after I admit you, you will be able to use the "select course" and "select assignent" windows to start the Kinematics homework.

Sample Lab Report

Sample Lab Report2013

Unit 1 - Kinematics in 1 dimension

Goals:
1. Know and apply the definition for average velocity.
2. Know and apply the definition for average acceleration.
3. Differentiate instantaneous and average velocity.
4. Interpret graphs of position, velocity and acceleration, including through the use of slopes and the area under the graph.
5. Draw position, velocity and acceleration graphs for described motion.
6. Know the acceleration due to gravity.
7. Solve problems by using 5 basic mechanics equations.
8. Properly use sign conventions for positive and negative acceleration and velocity.
9. Describe sources of error as either random or systematic and suggest basic ways of reducing error such as controlling variables, doing multiple trials, collecting data over a wide range and using big sample sizes.

Homework:                             Due Date

Letter to Teacher                      Mon, 9/9

Lab 1 data presentation            Thurs/Fri, 9/12-13

Lab 1 report                             TuesWed , 9/17-18

First Quest hmwk assignment   Mon. 9/23
Second Quest hmwk assig       Sun. 9/29

Unit Test                                  Tues/Wed 10/1-2

Welcome to Physics

The 2013-2014 school year has started. Welcome to Physics.

Here is some general information about how the class runs.

Grades:
Approximately 50% Tests, 30% Labs, 20% homework

Tests: About twice a quarter, with semester finals also. Retakes are available, but only half the missed points are recoverable.

Labs: Although we’ll have weekly hands-on lab assignments, I’ll only have you write up formal lab reports about twice a quarter. (The first one will be due Sept. 18.) Late labs are penalized at 10% a week.

Homework: Most homework will be submitted online through the web site https://quest.cns.utexas.edu/   It will be graded for accuracy, but on a generous scale because I recognize that homework is practice and created to find mistakes. Students who have difficulty getting internet access should talk with me. Accommodations will be found. No late homework accepted except for excused absences.

Grading Scale: 100-90 A, 90-80 B, 80-70 C, 70-60 D,  0-60 F.

Supplies:
Textbook
Notebook, or section of a notebook
Calculator


I hope you find the class challenging and fun.
Ethan Medley

one more key

Link to answer key

Review Answer Key (2013 too)

Second Semester Review Answer Key 2012

Second Semester Goals

Current Electricity (Ch. 22-23)

1. Know meanings of potential difference (voltage), current, resistance, power. Be able to use appropriate relationships between them with correct abbreviations and units.

2. Properly use the terms series, parallel and circuit.

3. Draw and decipher circuit diagrams.

4. Determine current, resistance, potential difference and power output for any part of a circuit, including simple circuits, series circuits, parallel circuits and complex circuits with both series and parallel elements.

5. Describe what affects an object’s resistance and categorize resistors as ohmic or nonohmic

6. Interpret graphs about resistance: I vs. V and V vs. R.

7. Know how to include ammeters and voltmeters in a circuit and what this says about their resistances.

8. Describe the structure of a capacitor.

9. Describe how houses are wired and the role of circuit breakers.

10. Determine loss of energy to heat in wires and describe how it can be reduced.

11. Trace the conducting path through light bulbs.

12. Describe the production of electrical energy in batteries and the role of internal resistance.

13. Use the pressure metaphor for voltage and interpret color-coded voltage diagrams.



Magnetism (Ch. 24,25)

1. Explain the arrangements responsible for permanent magnets.

2. Describe what affects the strength of magnetic forces and an electromagnet’s field.

3. Describe the shape of magnetic fields around permanent magnets and charge carrying wires.

4. Describe the causes and beneficial effects of the Earth’s magnetic field.

5. Predict the direction of magnetic forces and induced currents.

6. Describe how magnetic forces are applied in electric motors and generators.

7. Determine currents and voltages produced by transformers.



Sound and Waves (Ch. 14,15)

1. Explain what a wave is.

2. Differentiate between longitudinal and transverse waves

3. Correctly use the vocabulary: medium, pulse, crest, trough, compression, and rarefaction.

4. Define and apply the following wave characteristics: period, frequency, velocity, wavelength, amplitude, and energy.

5. Apply the following relationships: T=1/f and v =f*wavelength.

6. Explain how standing waves are produced and correctly use the terms nodes and antinodes.

7. Explain the following wave behaviors, interference, beats, resonance, doppler effect and sonic booms.



Light (Ch. 16-19)

1. What is light?

a) Be able to describe strengths and weaknesses of the two models of light.

b) Be able to give effective examples showing the strengths of each model.

2. How light behaves

a) Colors.

i) What are primary, secondary and complementary colors.

ii) How are colors produced by dispersion, addition and subtraction of light.

b) Reflection

i) What is the law of reflection.

ii) Be able to locate images and make ray diagrams for reflection.

c) Refraction

i) What is it?

ii) What is Snell’s Law

iii) How did we determine a law for refraction?

iv) Be able to solve problems and draw ray diagrams.

d) Lenses

i) Be able to draw ray diagrams for converging and diverging lenses.

ii) Identify images as real or virtual.

More Electricity Review Sheet Practice

https://docs.google.com/document/d/1eZoVd-F6ku9o-qCF0c_SnGRQgO1eZ93p5Rl3b5_St1I/pub

Magnetism Goals

Homework due 6/4, Tuesday

Magnetism (Ch. 24,25)
Explain the arrangements responsible for permanent magnets.
Describe what affects the strength of magnetic forces and an electromagnet’s field.
Describe the shape of magnetic fields around permanent magnets and charge carrying wires.
Describe the causes and beneficial effects of the Earth’s magnetic field.
Predict the direction of magnetic forces and induced currents.
Describe how magnetic forces are applied in electric motors and generators.
Determine currents and voltages produced by transformers.

Electricity Review Key

The answers for the two power calculations for the fist circuit in question 2 are wrong. The calculations are set up correctly though.
Current Electricity Review Key

Electricity Unit Overview

Quest Online Homework due 5/2, 5/9 and 5/16

Resistance of a Light Bulb lab due 5/14

Unit Test 5/21

Current Electricity Unit Goals

• Know meanings of potential difference (voltage), current, resistance, power. Be able to use appropriate relationships between them with correct abbreviations and units.
• Properly use the terms series, parallel and circuit.
• Draw and decipher circuit diagrams.
• Determine current, resistance, potential difference and power output for any part of a circuit, including
• Simple circuits, series circuits, parallel circuits and complex circuits with both series and parallel elements.
• Describe what affects an object’s resistance and categorize resistors as ohmic or nonohmic
• Interpret graphs about resistance I vs. V and V vs. R.
• Know how to include ammeters and voltmeters in a circuit and what this says about their resistances.
• Describe the structure of a capacitor.
• Use transient currents to describe how steady state voltages and currents are established.
• Describe how houses are wired and the role of circuit breakers.
• Determine loss of energy to heat in wires and describe how it can be reduced.
• Trace the conducting path through light bulbs.
• Describe the souce of internal resistance.
• Use the pressure metaphor for voltage and interpret color-coded voltage diagrams.

experiments summary

Light Review Answer Key

Light Answer Key2012

LIght Unit

Light Unit Goals

1) What is light?

• Be able to describe strengths and weaknesses of the two models of light.
• Be able to give effective examples showing the strengths of each model.

2) How light behaves

• Colors.

1. What are primary, secondary and complementary colors.
2. How are colors produced by dispersion, addition and subtraction of light.

• Reflection

1. What is the law of reflection.
2. Be able to locate images and make ray diagrams for reflection from flat mirrors.

• Refraction

1. What is it?
2. What is Snell’s Law
3.  How did we determine a law for refraction?
4. Be able to solve problems and draw ray diagrams, including for complete internal reflection.

• Lenses

1. Be able to draw ray diagrams for converging and diverging lenses.
2. Identify images as real or virtual.

Sections in book: most of chapters 16-19

Important Dates:

Homework Sets Due:  3/7, 3/13, 4/4

Refraction Lab due 3/14

 Particle Model Lab due 3/19

Test 4/12

Bev Cleary Presentations4/16

sound review sheets

Sound Unit

Goals
1. Explain what a wave is.
2. Differentiate between longitudinal and transverse waves
3. Correctly use the vocabulary: medium, pulse, crest, trough, compression, and rarefaction.
4. Define and apply the following wave characteristics: period, frequency, velocity, wavelength, amplitude, and energy.
5. Apply the following relationships: T=1/f and v =f*wavelength.
6. Explain how standing waves are produced and correctly use the terms nodes and antinodes.
7. Explain the following wave behaviors, interference, beats, resonance, doppler effect and sonic booms.

Key dates:
Online Homework : due Wednesday evening 2/13 and tuesday 2/19
Speed of sound lab : performed 2/14. due: negotiable, but probably 2/21
Test 2/21

Wave Speed Lab Form

Answers to the Semester 1 Review Questions

There was an error in this post originally.  I've corrected it.  number 24 should be "d", not "e".

1.d 2. d 3.a 4.c 5.a 6.ad 7. bc 8.ab 9.c 10. c
11. a 12.d 13.d 14. d 15.c 16. c 17. b 18.a 19.c 20.c
21. c 22.c 23.b 24.d 25.c 26.c 27.d 28.a 29.c 30.b
31. d (What a painfully worded question.  No double negatives on the real test.) 32.b 33.c

Study hard.

Reviewing

I'll pass out review questions and a summary of major topics in class next week.  In the mean time you can use quest to make a customized review set of questions, focusing on all of the homework questions that you missed the first time around.  Follow these steps  (copied from their help menu)

• Customized Review 
• To help you review for an upcoming test, use the Custom Review option to create customized reviews that focus on your weakest areas. Choose Grade Summary from the left menu, then the Grades by Subject Area link to see the Custom Review option.  

(My caveat:  While this has worked in years past, they do have a new interface now.  I don't interact with the program the same way that students do, and when I tried this it didn't work.  Of course, I haven't  missed (or worked) a single problem in Quest this year, so the problem might be as simple as this.  It can't hurt to give it a try.)

Mistake in homework due date time.

I just changed the homework to be due Monday night at 10:00.
I don't know how I managed to make the assignment due at 4:00 in all three classes.  I almost think that it might be a glitch in their new software.  Please pay attention to the posted deadlines and alert me if they seem off.  I will try to do so too.
Thanks

Momentum in 2D lab revised expectations

I didn't expect the data analysis section of the lab being as hard as it was.  Due to time constraints, I'm going to alter the lab expectations.  You still need to write the background section, conclusion and error analysis, but I have created and analyzed a set of data - calculations and vector diagram.  You may use mine.  I'll have it for you on Monday.  If you've already done the data analysis on your own, you can use your own and get 5 extra credit points.

Requirements for Momentum in 2-D lab

Lab Report
Background

• Momentum, Conservation of Momentum, How to add vectors, What assumptions are we making?

Method:

• Diagram

Data:  (no graphs this time)

• Data Table
• Vector diagrams with vector addition (2)
• Calculations (lots)  show and explain your work

Conclusion:

• Was momentum conserved?
• How convincing was your evidence?

Error Analysis:

• How well did we achieve our assumed conditions?
• How closely could you make measurements?  (mass, velocity, angle)
• How closely could you make drawings, calculations?
• How did these these limitations affect your interpretation of the results?
• What was your percent errors?

Unit 5: Energy, Momentum and the Conservation Laws

Goals
1.Define and determine work, energy and power.
2.List a variety of types of energy and classify them as potential or kinetic.
3.Solve problems using equations for gravitational potential energy and kinetic energy.
4.State and apply the law of conservation of energy.
5.Account for energy in its various forms through a series of transformations, including energy “lost” to heat.
6.Define impulse and momentum and describe how they’re related.
7.State the law of conservation of momentum and use it to solve problems in one and two dimensions.
8.Classify collisions as completely elastic, completely inelastic or somewhere in between.

Homework Assignments are due Sunday Jan 13, and on Wednesday January 23.

A lab report will be due on Thursday Jan 17th.

we will have two days to review for the final at the beginning of February.