Physics 105 - Fall 2009
Welcome to Physics 105!
Instructor: John S. Colton
Email address: "john_" (including the underscore) plus "colton" at "byu dot edu"
Office hours: Wed 2:30 - 4 pm, Fri 3:30 - 5 pm, in the Tutorial Lab N304 ESC.
Office: N335 ESC, available by appointment
T.A./grader: Sara Hyde
TA's email address: "byuphysics105" plus "at" plus "gmail dot com". This is NOT Dr. Colton's address. Don't send stuff to him here.
TA's office hours: Thurs 3 - 3:50 pm and Fri 11 - 11:50 am, in the Tutorial Lab N304 ESC (times now finalized)
- 21 Dec 2009 - Final exam solutions posted, final grade boundaries set. Grades will probably be reported to Registrar on Dec 23.
- 11 Dec 2009 - I gave people who took the "Colton course improvement survey" 3 bonus points. You should see them on your computer grade reports in extra credit category 7.
- 4 Dec 2009 - Exam 3 FBDs have finally all been graded and recorded. Please pick up old exams, etc., from the "turn back" boxes
- 2 Dec 2009 - Exam 4 solutions posted (sorry, I had meant to do that a day or two ago).
- 27 Nov 2009 - The front pages from the previous exams were removed and the front page of the final exam was posted. Some of the equations from the last part of the semester were changed from what is written on exam 4.
- 18 Nov 2009 - I added two problems (on Wednesday morning) to the lecture notes for the in-class exam review, so if you printed out a copy of the notes before then, you might want to print the additional problems (HW19-3 and 19-5b).
- 17 Nov 2009 - The front page for exam 4 edited another time or two.
- 9 Nov 2009 - I posted the front page for exam 4 below, since I changed it just a little from the front page for exam 3.
- 13 Oct 2009 - Exam 2 solutions posted
- 28 Sep 2009 - The TA-led review for the 2nd midterm has been set: Thurs 6 - 7:30 pm, in room 455 MARB.
- 28 Sep 2009 - I posted a simulation of the "racing balls" demo in the "videos of demos" section, since I couldn't film the actual demo.
- 28 Sep 2009 - I posted the first 1.2 pages of exam 2. That's the page of equations, plus instructions for the exam.
- 14 Sep 2009 - I have to cancel my Friday office hours this week (I'll be out of town). That's Fri, 9/18/09.
- 8 Sep 2009 - The "moving man" and "vector web demo" links from lecture 3 posted at the very bottom. A few links from lecture 4 posted also.
- 7 Sep 2009 - Sara (the grader/TA) has finalized her office hours. If you have a grading question regarding extra credit, free body diagrams, etc., you can talk to her in person.
- 24 Aug 2009 - These links now working: homework submission, check grade, obtain CID, register clicker.
- 17 Aug 2009 - Wed office hour changed to 2:30 - 4 pm (instead of 3:30 - 5 pm). The syllabus has the incorrect hour listed.
- 6 Jul 09 - Posted syllabus/course packet below
- 29 Jun 09 - Website set up, now open for business. As I add things to the website, I will post announcements here in this section.
The textbook for the class is College Physics, by Serway & Faughn (5th, 6th, 7th editions) or by Serway & Vuille (8th edition). Only volume 1 is needed for Physics 105; but volume 2 is used in Physics 106, so if you’re planning to take that course too it may be cheaper to get a book with both volumes combined. Feel free to obtain an inexpensive used copy.
Syllabus and Course Packet
Physics 105 syllabus - Fall 09.pdf - The syllabus will also be available in the bookstore for purchase (for about $2.34). Or, if you prefer you can print out your own copy from this pdf file.
- Warm-up exercises must be completed prior to 8 am the day of class to receive credit: [none for lecture 1] | warmup for lecture 2 | warmup 3 | warmup 4 | warmup 5 | warmup 6 | warmup 7 | warmup 8 | warmup 9 | [none for lecture 10] | warmup 11 | warmup 12 | warmup 13 | warmup 14 | warmup 15 | warmup 16 | [none for lecture 17] | warmup 18 | warmup 19 | warmup 20 | warmup 21 | warmup 22 | warmup 23 | [none for lecture 24] | warmup 25 | warmup 26 | warmup 27 | warmup 28 - due 10 Dec 2009 (last warmup!)
- Answers to past warm-up exercises: [none for lecture 1] | warmup 2 answers | 3 answers | 4 answers | 5 answers | 6 answers | 7 answers | 8 answers | 9 answers | [none for lecture 10] | 11 answers | 12 answers | 13 answers | 14 answers | 15 answers | 16 answers | [none for lecture 17] | 18 answers | 19 answers | 20 answers | 21 answers | 22 answers | 23 answers | [none for lecture 24] | 25 answers | 26 answers | 27 answers | 28 answers
- Blank notes, pre-lecture (four pages/sheet): notes for lecture 1 | lecture 2 | lecture 3 | lecture 4 | lecture 5 | lecture 6 | lecture 7 | lecture 8 | lecture 9 | lecture 10 | lecture 11 | lecture 12 | lecture 13 | lecture 14 | lecture 15 | lecture 16 | lecture 17 | lecture 18 | lecture 19 | lecture 20 | lecture 21 | lecture 22 | lecture 23 | lecture 24 - 19 Nov 2009 | lecture 25 | lecture 26 | lecture 27 | lecture 28 - 10 Dec 2009 (last lecture!)
- Filled-out notes, post-lecture (black and white, one page/sheet): lecture 1 filled out | 2 filled out | 3 filled out | 4 filled out | 5 filled out | 6 filled out | 7 filled out | 8 filled out | 9 filled out | 10 filled out | 11 filled out | 12 filled out | 13 filled out | 14 filled out | 15 filled out | 16 filled out | 17 filled out | 18 filled out | 19 filled out | 20 filled out | 21 filled out | 22 filled out | 23 filled out | 24 filled out | 25 filled out Warning: there's an incorrect answer to a warmup question in these notes. The answer to the warmup question at the top of page 7 should be "the same". Somehow when I circled the answer in class, I had in mind that the question was asking about a mass swinging on a pendulum instead of a mass oscillating on a spring. | 26 filled out | 27 filled out | 28 filled out
Here are videos of nearly all the demos I will do/have done in Physics 105. Some were recorded last year.
- lecture 1 - no demos
- lecture 2 - penny and feather
- lecture 3 - milk drop acceleration of gravity
- lecture 4 - vertical cannon cart | shooter and dropper | monkey hunter
- lecture 5 - pushing on two balls | ping pong ball cannon | still shot of ball emerging from end of cannon
- lecture 6 - Newton's Third Law | tablecloth jerk | pen and hoop | ball on string | pulleys redirect tension | simple pulley constant velocity | block and tackle
- lecture 7 - static vs kinetic friction | measuring mu (note: to finish the calculation, tan(26°) = 0.49, so μs = 0.49)
- lecture 8 - ant living on ball (note that when I said the ant thinks there's a "downward force", I meant "outward force")
- lecture 9 - pushing cart vs lifting cart (sorry, no video)
- lecture 10 - two track race | pendulum narrowly missing instructor | predicting speed (not done this year)| Hooke's law | measuring k via N2 | measuring k of shooter cart
- lecture 11 - human horsepower (sorry, no video) | Collision1 - small hits small - velcro | Collision2 - small hits big - velcro
- lecture 12 - Balls knocking over block | Collision4 - small hits big - elastic | Newton's cradle with duckpin balls | velocity amplifier | Collision3 - 'explosion'
- lecture 13 - thrown foam object | rotating bicycle wheel
- lecture 14 - t-handle torque | balanced objects
- lecture 15 - Preclass video to watch: cart and ball race
- lecture 15 - spinning rod | two "identical" rods (sorry, no video) | Moment of inertia races: hoop vs sphere, hoop vs disk, big disk vs little disk, big hoop vs little hoop, big sphere vs little sphere
- lecture 16 - Hoberman sphere | spinning chair and weights | gyroscope | train on rotating track (sorry, no video)
- lecture 17, exam 2 material - strange briefcase | bicycle wheel precession | rotating person - single wheel | rotating person - double wheel
- lecture 17, exam 3 material - force vs pressure | bed of nails | collapsing can | Magdeburg hemispheres | reverse tug of war
- lecture 18 - Coke vs Diet Coke | aluminum foil sink or float | Pascal's barrel (not done this year) | Bernoulli red fluid | blowing on paper | floating ball | chimney effect | cards and wooden block | ball in funnel (not done this year) | link to Elder Nelson's 1997 general conference talk
- lecture 19 - ping pong curve balls (sorry, no video) | liquid bulb thermometer | pressure gauge thermometer | bimetallic strip | ring and ball | rubber nail | lead bell
- lecture 20 - boiling water at 300K
- lecture 21 - helium vs air balloon | LN volume expansion | LN balloon pop (not done this year)
- lecture 22 - lighter molecules go faster | fast molecules cause pressure
- lecture 23 - adiabatic cotton burner | freeze spray | Stirling engine
- lecture 24 - spring vs circular motion | mass on spring - period depends on mass | pendulum - period depends on length | pendulum - period sometimes depends on amplitude | Slinky - longitudinal and transverse waves
- lecture 25 - tubing - wavespeed depends on tension | violin - pitch depends on tension | Shive wave machine - amplitudes add or subtract | 6 still shots of the amplitudes adding/subtracting: still1, still2, still3, (notice in the next one that the two waves essentially cancel each other out for a brief instant in time) still4, still5, still6 | no sound in a vacuum | hearing test | how a speaker works | tuning forks | singing rod | Joy to the World
- lecture 26 - Doppler effect | two speaker interference
- lecture 27 - standing waves on a rubber tube | lady's belt and jigsaw | trumpet harmonics (note in the recording I said "even without using notes" where I meant "without using valves") | open vs closed end | flame standing waves | beats | beating tubes | spectrum analyzer on computer (sorry, no video)
- lecture 28 - no demos
Discussion Forum (Google Groups)
I strongly recommend working through the old exams entirely on your own before looking at the solutions. Pre-curve averages are listed for the multiple choice parts of the exams. I intend to make this year's exams a bit easier, but no guarantees! Notice that there are some major differences between the old exams and what I plan for this year. Some key differences: no time limit this year, no note cards, and calculators should not be needed. In style, this year's exams will likely be closest to the Fall 2008 final exam.
- Exam 1 - Fall 2007 (82.9%) | Fall 2007 solutions | Fall 2008 (79.3%) | Fall 2008 solutions
- Exam 2 - Fall 2007 (64.9%) | Fall 2007 solutions | Fall 2008 (73.4%) | Fall 2008 solutions
- Exam 3 - Fall 2007 (66.0%) | Fall 2007 solutions | Fall 2008 (69.3%) | Fall 2008 solutions
- Exam 4 - Fall 2007 (63.4%) | Fall 2007 solutions | Fall 2008 (70.2%) | Fall 2008 solutions
- Final Exam - Fall 2007 (70.9%) | Fall 2007 solutions | Fall 2008 (63.6%) | Fall 2008 solutions
This year's exams
- The front pages from the previous exams have been removed. Here's the front page of the final exam. Some of the equations from the last part of the semester have been changed from what is written on exam 4.
- Exam 1 solutions | Exam 2 solutions | Exam 3 solutions | Exam 4 solutions (note: the first version the solutions had a mistake for problem 14. sorry about that!) | Final Exam solutions
How to get started
- You need to do the following things as soon as the semester begins. (If you have added the class late, it's even more important to do them ASAP.)
→ If you have not received one in an email, get a "class ID number" using the "Obtain your class ID number" link on this page. You will use the CID as your personal identifier for all your assignments.
→ Read the syllabus, available either as a pdf file elsewhere on this web page, or from the bookstore. Among other things, the HW problems are found in the syllabus.
→ Get a copy of the textbook (see textbook info, elsewhere on this web page). If you can't get one soon, you can use one of the copies available in the Tutorial Lab (see Tutorial Lab info elsewhere on this web page).
→ Do the reading assignments for each upcoming lecture as marked on pg 1 of the syllabus; if joining late, do the past reading assignments.
→ For each upcoming lecture, answer the warm-up quiz for the lecture via the website form. Those quizzes are due by 8 am the day of the lecture.
→ Get an "i-clicker" at the bookstore if you don't already have one. Bring your clicker to each class.
→ Register your clicker (via the link elsewhere on this page) so that you get credit for in-class clicker quizzes.
→ Get your individualized homework data numbers which you will plug into the HW problems in your syllabus, using the "Print HW data sheet" link on this page.
→ Start working HW problems! The first assignment is due Sat, Sept 5. You can get credit for late assignments, so work the HW sets you miss/have missed, in addition to the ones coming up. The syllabus has much more about our online HW system.
→ Submit your HW answers via the online system using the "Submit HW" link. Again, read how to do this in the HW section of the syllabus. Learn how to get partial credit by re-submitting the problems you get wrong. Talk to other students to figure this out, if necessary. HW due-dates are marked on page 1 of the syllabus.
→ Register for the class Google group.
- Stokes' website that has the "driving past bell tower", "Doppler effect" and "Sonic boom" web-demos, from lecture 27
- NASA's satellite tracking website from lecture 13
- Stokes' baseball velocity components animation from lecture 4
- The "projectile motion" applet (with air resistance) from lecture 4
- "Scorched Earth" computer game from lecture 4
- The "moving man" applet from lecture 3
- The "vector web demo" from lecture 3
- Worked physics problems available from U of Oregon
- Study tips, by Dan Styer of Oberlin College
- How to solve physics problems, by Dan Styer of Oberlin College
- Dr Colton's MCAT formula review sheet (includes Physics 105 and 106 material)