Physics 105
Instructor: John S.
Colton
Email address: "john" plus underscore plus "colton" at "byu" dot "edu".
Semester: Fall 2008
Office hours: Wed 34 pm, in the Tutorial Lab
Office: N335 ESC, available by appointment
Problem solving sessions: Fri 34 pm in 455 MARB; also Mon 12 pm in 455 MARB
T.A./grader: Becca Fluckiger
Her email address: "physics105colton" plus "at" plus "gmail.com". This is NOT
Dr. Colton's address. Don't send stuff to him here!
Office hours: Wed 122 pm, in the Tutorial Lab
Announcements
 23 Dec 08  final exam solutions
posted below
 20 Dec 08
 5 points added to everyone's final exam; grade boundaries set (see email)

11 Dec 08  Here is the first
page of this year's final exam, so you can see what formulas are given:
final exam  page 1.pdf

10 Dec 08  Locations for final exam
review set: Thurs 79 pm in W111 Benson; Fri 13 pm in C215 ESC.

9 Dec 08 
Rate the Tutorial Lab TAs
link added
 1 Dec 08  Solutions to this year's exam 4
posted below
 25 Nov 08  Last year's final has
been posted below, with solutions.
 17 Nov 08  A couple weeks' worth
of demo videos were posted below
 14 Nov 08  Evening exam TA review session
scheduled for Exam 4: Thursday 79 pm, room C215 ESC
 27 Oct 08  Special evening exam
review session planned for Thursday 79 pm, room C215 ESC. (Session to be led by
two Tutorial lab TAs.)
 23 Oct
08  As a result of the midsemester voting, my Friday office hours will be
converted to a problem solving session, to be held in 455 MARB
 21 Oct
08  Here's the
midsemester
survey data
 14 Oct 08  Dr Colton's Friday office hours changed to 34 pm
(they had been 45 pm)
 8 Oct 08  I fixed some errors in sample exam 2
 2
Oct 08  8 students still aren't getting credit for clicker quizzes.

2 Oct 08  Last year's exam 2 (and solutions) posted below.
 25 Sep 08  By
the way, 8 students still aren't getting credit for their clicker quizzes. Make
sure you're not one of the 8!
 25 Sep 08  All Friday homework duedates now
moved to Saturday! The only exception is that all late homework, as well as the
retries for HW22, continues to be due on Fri Dec 19.
 23 Sep 08  As a
reminder, turn in your free body diagrams for HW 5 and beyond in the boxes
labeled "105 Colton" near N357 ESC

23 Sep 08  Exam 1 solutions posted to website, see down near the bottom
 18
Sep 08  Cool videos (and a still shot) of the ping pong ball demo posted below

17 Sep 08  TA's email address added to top of page
 17 Sep 08  Link to
private tutors Google group added below. Several tutors now available!
 15 Sep
08  HW 2 and HW 3 solutions also posted. They are in the glass cases near N361
ESC.
 12 Sep 08  Various demo videos posted below
 11 Sep 08  Last year's
Exam 1 posted below
 11 Sep 08  HW 1 solutions posted in hallway of Eyring
building (outside of Tutorial Lab)
 11 Sep 08  Problem Solving Help Session
permanently scheduled for room 455 MARB (M 12 pm)
Textbook
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 08.pdf
The syllabus will be available in the bookstore for purchase ($2.30). Or, if
you prefer you can print out your own copy. Or just use this electronic
version.
→ 21 Aug 08  Mistake discovered! The
earlier version of the syllabus (the one the bookstore has) says on pg 2
that classes are MWF. Don't believe it! Classes are T Th, as you expected
when you signed up for this class. (Sorry about that.)
→ 2 Sep 08 Colton office hours changed
due to a conflict on Wednesday. The office hours are now Wed 34 pm and Fri
45 pm.
WarmUp Exercises
Class Notes
Videos of Demos
 As advertised, I will be posting videos for many of the demos. These
are highres video files in avi format, encoded via divx. If your computer has
problems playing the file, you can try downloading this
free divx player. The down side
to the high resolution
is that the file size is large. If the large file size is a problem for anyone, let
me know and I'll see if I can downsize the video quality.
 Sep 9:
milkdrop demo (110 MB)

Sep 11: rolling cart with springloaded ball (sorrythe video didn't turn out)
 falling monkey demo (67 MB)

Sep 18:
ping pong ball cannon (65 MB).
A still shot
of the single frame where you can see the ball emerging (jpg) (90KB)
 Sep
23: ball in cup (55 MB) 
tablecloth (17 MB) 
pen and hoop (26 MB)  thrown pen from
rotating chair (sorry, the video didn't turn out; chair was rotating too
quickly)
 Sep 25: static vs kinetic
friction (68 MB)
 Sep 30: pendulum
narrowly missing Dr Colton on the upswing (76 MB)
 Oct 2:
falling weight powering lightbulb (88
MB)
 Oct 9: Collision1: small hits
small, Velcro (24 MB)  Collision2:
small hits big, Velcro (21 MB) 
"Explosion" (20 MB)  Collision3 (didn't turn out) 
Collision4: small hits small, elastic
(3 MB)  Balls knocking over block
(11 MB)  Newton's Cradle (30 MB) 
"Velocity amplifier" (6 MB)

Oct 14: CO_{2} rocket (35 MB);
rocket from a second angle (11 MB) 
thrown foam object (didn't turn out; camera couldn't focus)

Oct 21: torque depends on distance from pivot
(26 MB)  various balanced objects
(59 MB)

Oct 23: spinning rod (37 MB) 
RACES: hoop vs sphere (30 MB),
big disk vs little disk
(7 MB), hoop vs. disk (45 MB),
big sphere vs little
sphere (17 MB), big hoop vs
little hoop (13 MB)

Oct 28: Hoberman sphere (35 MB) 
figureskater chair (16 MB) 
strange briefcase (64 MB) 
"precession" of bike wheel (53 MB) 
rotating person (single wheel)
(68 MB)  nonrotating person
(double wheel) (54 MB)

Nov 4: force vs pressure
(35 MB)  bed of nails (94 MB) 
collapsing can (49 MB) 
Magdeburg hemispheres
(100 MB)

Nov 6: weight in water (25
MB)  red fluid Bernoulli (46 MB) 
ping pong curving (didn't turn out; focusing problems) 
blowing on paper (10 MB) 
suspended ball &
bottle (57 MB)  ball in
funnel (33 MB)  chimney effect
(46 MB)

Nov 11: thermal
expansion thermometer (47 MB) 
ring and ball (50 MB) 
helium balloon in liquid
nitrogen (40 MB)  air
balloon in LN (58 MB)  rubber nail
(41 MB)  lead bell (35 MB)

Nov 13: lighting match with
radiation (54 MB)  a "light mill"
(47 MB)

Nov 20: adiabatic compression
(64 MB)  freeze spray (28 MB) 
Stirling engine (57 MB)

Dec 2: spring vs
circular motion (53 MB)  long
slinky (24 MB)  waves
passing through each other (19 MB)

Dec 4: sound in a vacuum (36
MB)  singing rod (24 MB) 
Joy to the World (66 MB)

Dec 9: waves produced by a jigsaw (72
MB)  sound waves seen via flames (61
MB)
Homework
Scores and Grade
Class Identification Numbers
Quiz Transmitter IDs
Tutorial Lab Info
Discussion Forum
(Google Groups)
This year's exam
solutions
Old Exams
 Old 105 final.doc  This
is the final exam from last year, without reformatting. Read the
introductory note highlighted in yellow. Your final will be a bit
different (mostly due to the "no calculators" rule), but this will still
provide a good gauge of where you're at relative to where you need to
be.
 Old 105 final
 solutions.doc  Work out the bare exam before looking at the
solutions!
 Old 105 exam 4.doc.
This is exam 4 from last year, reformatted slightly. FYI the average was
a 63. I'll try to make this year's exam a little easier.
 Old 105
exam 4  solutions. doc. Work out the bare exam before looking at
the solutions!
 Old 105 exam 3.doc.
This is exam 3 from last year, reformatted slightly. Note: I will
try to make this year's exam 3 a little easier than last year's.
 Old 105
exam 3  solutions. doc. As always, please work
out the bare exam before looking at the solutions.
 Old 105 exam 2.doc.
This is the exam I gave last year, reformatted slightly. Note: I will
try to make this year's exam 2 just a little easier than last year's.
Another note: problem 21 is not something that I emphasized at all this
year. Note: an earlier version
had some minor problems with answer ranges and the like, mainly because
I didn't do answer ranges the same way last year. Also, problems 1820
had some more serious errors. Hopefully all problems now fixed.
 Old 105
exam 2  solutions. doc. As before, I strongly encourage you to work
out the bare exam first on your own, and only then download these
solutions to see how you did.
 Old 105 exam 1.doc.
This is the exam I gave last year, just reformatted a little to make it
match the format I plan to use this year. WARNING: this exam had a
higher average score than I like, so I will probably make the exam this
year a little bit harder.
 Old 105
exam 1  solutions.doc. I strongly encourage you to work out
the bare exam first, on your own, and only then download these solutions
to see how you did.
The old "If you are new"
section (for historical interest?)
 If you have added the class late, you've got some catching up to do! Proceed
as follows:
→ Get a "class ID number" using the link below. You will use the CID in all your
assignments.
→ Read the syllabus, available either below (pdf file) or from the bookstore.
Also, the HW problems are found in the syllabus.
→ Get a copy of the textbook (see textbook info, below). If you can't get one
soon, use one of the copies available in the Tutorial Lab (see Tutorial Lab info
below).
→ Do the past reading assignments as marked on pg 1 of the syllabus, and in the
future, do the reading assignments for each lecture.
→ For each (future) lecture, answer the warmup quiz for the lecture (see
below). Those quizzes are due by 8 am the day of the lecture.
→ Get an "iclicker" at the bookstore if you don't already have one. Bring your
clicker to each class.
→ Register your clicker (see below) so that you get credit for inclass clicker
quizzes.
→ Get your individualized homework data numbers which you will plug into the HW
problems in your syllabus, using the link below.
→ Start working HW problems! You can get credit for late assignments, so work
the HW sets you have missed, in addition to the ones coming up. Read much more
about our online HW system, in the syllabus.
→ Submit your HW answers via the online system using the link below. Again, read
how to do this in the HW section of the syllabus. Learn how to resubmit any
problems that you get wrong. Talk to other students to figure this out, if
necessary. HW sets are due Wednesdays and Fridays.
Supplementary Material
Current Topics in Physics