PHY 2020 Introduction to Principles of Physics
Fall 2007

Lectures:  Monday, Wednesday and Friday at 1.55 p.m.

Classroom: 1002 New Physics Building

Lecturer:  Prof. John Yelton
yelton@phys.ufl.edu
2031 New Physics Building
392-8475
Office Hours Mon. & Wed, 3rd period 9:35-10:25

FINAL TEST SCORES and GRADES NOW AVAILABLE, CLICK here
The grading sheet needs some explanation. First, your pseudonym. Then the score (out of 40) for the final. That gets divided into 2, to get 2 of your 6 test scores. These get ordered from lowest to highest. The lowest is shown first (and the column says "drop" because this is dropped). The second lowest gets halved (thus the column says "half drop"). Then the next 4 count. Add these 5 numbers and you get the total for tests (column says "tests"). Then the H-ITT as before, then the grand total (maximum 100%). Then the grade. Note the new grading scale. 74.5% is an "A", 69.5% is a B+, 60% is a B, 50% is a C+, 42.5% is a C, 37.5% is a D+ and 30% is a D. That's a bit looser than I expected to do, but I do realize it is tough to get everything right in tests like this. If you want you final test back, you can come to my office and I have them. I did check those people on the borderlines to make sure I had not made mistakes.
FIRST 4 TEST RESULTS, and H-ITT OVERALL SCORES, CLICK here
FINAL IS ON TUESDAY AT 10 a.m. IN THE USUAL LOCATION. Here is the formula sheet - any omissions, please let me know. Formulae in a word .doc
Note that in the scores I have given the running total, and the lowest grade you could get (that is, what you will get if you don't turn up for the final). Of course, I would expect this grade to go up after the final (unless you do really badly). Note also, I have not done any rounding, "curving" or the like. I will think about this after the final scores are all in, but don't expect too much! Congratulations particularly to those people who got an "A" without taking the final. They got more 80+/90 with no dropped tests, which shows it is possible.
First test solutions, in 4 pages (.jpg files). 1 2 3 4
Second test solutions, in 5 pages (.jpg files). 1 2 3 4 5
Third test solutions are in .pdf format. Click here.
Fourth test solutions in .pdf format.Click here.
The following is the guaranteed grading scale - 80% for an "A", 72.5 "B+", 65% for a "B", 57.5% for a "C+" 50% for a "C", 42.5% for a "D+". If you achieve what you want without coming to the final that's fine with me.


Grading policy. Maximum total possible 100 points.
  • a) Tests There are 4 in-class tests during the semester, each of which are 20 points. There is a final exam, worth 40 points. This final score is divided into two halves, so that gives 6 blocks of 20 points each. They are then ordered from highest to lowest. The top 4 are taken (max 80 points), the fifth is halved (max 10 points), the last is dropped. That gives 90 points from tests, that is 90% of the grade is in tests. The tests will be in a "short-answer" format - not multiple choice. Essential formulae will be supplied for the test. No crib-sheets, books or even calculators may be used!
  • b) In-class Quizzes Use of the H-ITT clickers is worth 10% of the grade. Each question is worth 2 points for a correct answer and 1 point for a wrong answer. One quarter of the questions are dropped. Giving your H-ITT clicker to someone else is considered cheating!
    Note that one test is dropped, and 25% of the in-class questions are dropped. Because of this generous dropping policy, there are no make-ups! If you miss a test then that is your drop. (Note that students who are out for a long time should always inform the lecturer, to see what can be done.)
    Philosophy of the course This course is designed for people who do not necessarily have a background in physics. We accent the physics of everyday life. We hope that this can serve as a foundation that will help if you are going to take, for instance, PHY2053 or PHY2048, as well as being a good survey of the basics of physics that will stay for you for the rest of your lives. There is no obligatory homework (but there is recommended homework). Therefore, students who have a good background can do well in this course putting in relatively few hours of work. However, if you do not attend class, you will not only miss the opportunity of getting 10% of the grade, you will also miss the explanations and examples that it will be necessary to understand for the tests. The course moves FAST - often one subject per class period. If you miss class, you will miss an entire subject - be warned.
    Calender of Events
    Please do not print this out! It will likely changes as the semester progresses, depending on how long we take on each subject, how well people do in tests, etc. The test dates are also preliminary.
    8/24 : First lecture Chapter 1-2 (Introduction to Course and to Physics)
    8/27: Lecture 2 Chapters 3 (Description of Motion)
    8/29: Lecture 3 Chapter 3 (Falling Bodies)
    8/31 Lecture 4 Chapter 4 (Newton's Laws)
    9/5: Lecture 5 Chapter 5 (Newton's Laws in 3D)
    9/7: Lecture 6 Chapter 5 (Newton's Laws in 3D)
    9/10: Lecture 7 Chapter 6 (Gravity and Circular Motion)
    9/12: Lecture 7 Chapter 6 (Gravity and Circular Motion)
    9/14: Test #1 (Up to and including Chapter 5)
    9/17: Lecture 9 Chapter 7 (Work and Energy)
    9/19: Lecture 10 Chapter 7 (Work and Energy)
    9/21: Lecture 11 Chapter 8 (Momentum)
    9/24: Lecture 12 Chapter 8 (Momentum)
    9/26 Lecture 13 Chapter 9 (Rotational Motion)
    9/28: Lecture 14 Chapter 9 (Rotational Motion)
    10/1: Lecture 15 Chapter 9 (Rotation)
    10/3: Lecture 16 Chapter 10 (Equilibrium)
    10/5: Lecture 17 Chapter 11 (Structure of Matter)
    10/8: Test #2 (Chapters 6 through 10)
    10/10 Lecture 18 Chapter 12 (Fluids - Archimedes)
    10/12: Lecture 19 Chapter 12 (Fluids - Archimedes)
    10/15: Lecture 20 Chapter 12/13 (Bernoulli's Principle. Temperature)
    10/17: Lecture 21 Chapter 14 (Heat)
    10/19: Lecture 22 Chapter 14 (Heat)
    10/22: Lecture 23 Chapter 14 (Heat)
    10/24: Lecture 23 Chapter 16 (Waves)
    10/26: Lecture 25 Chapter 16-17 (Waves & Sound)
    10/29: Test #3 (Chapters 11 through 14)
    10/31: Lecture 26 Chapter 17 (Sound)
    11/5 Lecture 27 Chapter 18 (Electrostatics)
    11/7: Lecture 28 Chapter 19 (Electric Currents)
    11/9: Lecture 29 Chapter 19 (Electric Currents)
    11/14: Lecture 30 Chapter 19 (Electric Currents)
    11/16: Lecture 31 Chapter 20 (Magnets)
    11/19: Lecture 32 Chapter 21 (Electromagnetism)
    11/21: Lecture 33 BY POPULAR VOTE - NO CLASS!
    11/26: Lecture 34 Chapter 22 (Light Rays and Lenses)
    11/28: Lecture 35 Chapter 23 (Light Waves)
    11/30: Lecture 36 Chapter 24 (Light Waves)
    12/3: Test #4 (Chapters 16-21)
    12/5: Review
    12/7: Dead Week
    12/11: (Tuesday). Final exam 10.00 a.m. (2 hours). Don't leave town before it unless you are happy to score a zero! All chapters covered.

    Hints on how to do well:
  • Attend Class Remember, the syllabus is defined by what is covered in lectures. You will not be tested on material not covered in class. The book covers lots of material, not all of which you are expected to know. If you miss class, my advice is to ask a class-mate for notes. I am happy to explain things in office hours which you did not understand. I am not so happy to explain things that you have not seen because you were not in class and did not get anybody's notes..
  • Be on time for class. Announcements are generally made at the beginning of each lecture, and you are responsible for learning of these whether you attend class or not.
  • If you are struggling, ask for help. The best way to get hold of me is after class, in our assigned office hours, or by e-mail. It is tough to discuss physics by e-mail, so it is better to make questions specific. If you want to discuss physics and cannot make time during my office hours, I can be flexible, but check with me first.
    Take Notes Something that is obvious at the time is quickly forgotten. When it comes to the night before a test, you will appreciate a good set of lecture notes.
  • Do some problems Here are are a sample of physics problems, and their solutions, taken from the textbook. Note that they are just are sample for extra practice. The best place to review for the tests are the notes given in class.
    Chapter 3 - numbers 5,8,10,13,16,19,22,23,25,27
    Chapter 4 - numbers 5,7,8,13,15,16
    Chapter 5 - numbers 1,3,5,9,13,15
    Chapter 7 - numbers 3,6,7,9,14,15,19,25,26,27
    Chapter 8 - numbers 2,3,5,7,8,9,11
    Chapter 9 - numbers 3,5,7,9,13,17,21,25
    Chapter 10 - numbers 11,13
    Chapter 11 - numbers 3,6,10
    Chapter 12 - numbers 2,6,10,14,19,21,24
    Chapter 13 - numbers 1,4,9,13,17,21,23
    Chapter 14 - numbers 1,3,7,11,13,16
    Chapter 15 - numbers 3,5,7,9,13
    Chapter 16 - numbers 1,3,5,9,11,13,15,17,19,21
    Chapter 17 - numbers 3,5,9,13,15,19,21,23,25,29
    Chapter 18 - numbers 3,5,9,11,13,15,17,21
    Chapter 19 - numbers 1,5,7,9,13,15,17,19,21,25
    Chapter 20 - numbers 1,5,9,15
    Chapter 22 - numbers 13,15,17,19,21
    Chapter 23 - numbers 1,7,9,15

    Homework Solutions (courtesy Prof. van Rinsvelt)

    Ch. 3: page 1, page 2
    Ch. 4: page 3
    Ch. 5: page 4
    Ch. 7: page 5
    Ch. 8: page 6
    Ch. 6: page 7
    Ch. 9: page 8
    Ch. 10: page 9
    Ch. 12: page 10
    Ch. 13: page 11
    Ch. 14: page 12
    Ch. 15: page 13
    Ch. 16: page 14
    Ch. 17: page 15, page 16
    Ch. 18: page 20
    Ch. 19: page 21, page 22
    Ch. 20: page 23
    Ch. 22: page 17, page 18
    Ch. 23: page 19