More Review Question Solutions

Here are solutions to the second set of review questions.  For those of you that did not pick up this handout it is page three in this link.


More Unit Four Review Questions

Unit 4 Review Sheets

Here is the answer key for the review sheet that was distributed last week on Thursday.

On Wednesday, I will post a key for the problem set I made available on Tuesday.
Unit 4 Practice Questions 2012

Unit 4: Advanced Concepts in Forces – friction, components, centripetal force, circular motion and gravity Nov. 26 – Dec. 13

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. 10
Homework: Dec. 2 and Dec. 11, both at 10:00 pm
Unit Test: Dec. 13

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

Preview Circular Motion

For Wednesday, please either read chapter 7.2 (p163) in your textbook, or lessons 1 and 2 about circular motion at this link.
http://www.physicsclassroom.com/Class/circles/

Then, preview the next Quest assignment.  It will be due next week on Tuesday.

The lab will be due next week on Monday.

Forces Review Answer Key

Unit Three: Newton's Laws of Motion

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. 1 

Homework due in the evening of Nov. 6

Test Date and Beverly Cleary Presentations:  Nov. 13 and 15  TBD

PreUnit 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 Monday night at 10:00.

Key concepts here are  inertia, force, mass vs. weight, and net force.

Practice Sheet for Vector Unit

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

Unit Two - Motion in 2 Dimensions

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,  Oct, 18

Homework due

10:00 pm Wednesday  the 10^th (9 Questions)

10:00 pm Wednesday  the 17^th (17 Questions)

Vectors preview

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 Wed. 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 Sheet

I've identified several mistakes on the key. P 2 problem 5 The graph should be a straight line sloping up from the origin. I had made the position graph not the velocity graph.
 p2. problem 8 part b The displacement should be 20m. I had accidentally used 20m/s instead of 30m/s.
 p.4. The units for part b should be m/s^2

Kinematics Review 2012

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.

Sample Lab Report

Sample Lab Report 2011.

Making a UT QUEST 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 depends on your period. For per 2: 2232, for per 3: 2233, for per 4: 2234. Enter the number 223... 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 2012 Fall). It will probably be one of the last ones. 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.

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                 Thurs, 9/6

Lab 1 data presentation       Wed, 9/12

Lab 1 report                       Tues , 9/18

First Quest hmwk assignment Mon. 9/24

Unit Test                               Thurs. 9/27

Welcome to Physics

The 2012-2013 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

Review Answer Key

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.

electricity review key

Current Electricity Review Key2012

Answer Key for Light Review Sheet

Light Answer Key2012

Light Goals

Physics – Light Unit Goals

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 from flat mirrors.

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, including for complete internal reflection.

d) Lenses

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

ii) Identify images as real or virtual.

Sections in book: most of chapters 16-19

Important Dates:

3/21 Particle Model Lab due

4/5 Second Homework Set due

4/11 Fernwood Presentations

4/9 Test

Homework due Jan 4th

Follow this link to read a short section from an online physics book. http://www.physicsclassroom.com/Class/momentum/

You should read parts a, b, and c from Lesson 1: The Impulse-Momentum Change Theorem. Try answering the questions as you go.

Alternately you could read section 9.1 from the textbook (pp. 199-206)
Then do the two problems from the new assignment at the UT site. It's due at 10:00 Wednesday evening. (Jan 4)

Unit 5: Momentum, Energy 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 TOMORROW Jan 4, on Thursday, January 12th, and on Wednesday January 25.

A Lab report will be due on Friday Jan 20th.

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