This is the course web page for Physics 105, Spring 2020

- Office: Gal 106-B
- Cell phone: (925)408-4419
- Office hours: Now by appointment.

Please feel free to text or email me to schedule a zoom appointment. - email: jkintner@stmarys-ca.edu

- Syllabus (fixed B+ typo)
- Tentative Schedule
- google drive for course
- the subfolder on google drive with my solutions. If you have time, please look at these as a style guide as well as an "answer."
- The textbook will be:
*Classical Dynamics*, 5th ed, by Thornton and Marion. Here is the link to the text on Amazon so you can see it. There are many other ways to get a copy. You can rent it, you can buy a used copy, and you might find other ways.

- Exam 1
- Date: Thursday, Mar 12
- Covers sections: Ch 2: all, App C, Ch 3: 1-3, 5, 6
- my notes on review for Exam 1
- Proposed cover sheet for Exam 1 Last edited 3/10 after class. I added things we talked about in class, and the directions.
- For the damped, driven oscillator, if you need the amplitude, $D$, and the phase angle, $\delta$, I will give them to you.
- blank exam to study
- solutions to exam 1
- Exam 2
- Date: Tuesday, Apr 28
- Covers sections: Ch 3: 8, Ch 5: 1-2, 4, Ch 6: 1-3, 5-6, Ch 7: 1-4 (I think I'll get this far, written 4/19)
- Proposed cover sheet for Exam 2. Edited slightly to add the Euler-Lagrange Eq with $x$'s and some parentheses.
- blank exam to study
- solutions to exam 2
- Final Exam
- Date:
**Thursday, May 21, 8-10am** - Covers sections: Ch 2-3, 5-7, App C, App F. Specific sections for Ch 2-3, 5-6 are above. Ch 7: 1-4, 6-10
- cover pages for final exam posted 5/12
- my review notes
- review problems
- my solutions to (most) of the review problems
- Colab (jupyter nb) of Fourier problem

- Class meetings
- Please text or email me to schedule a zoom office hour.

- This is optional this year, for extra credit.
**Presentations will be in class May 12.**(If we have more than that, they may spill over to May 14.) - Description
- google sheet of topics I just added order of presentation to this sheet.
- Class discussion, 4/30, we agreed that the optional final project
would be worth about three regular HW problems. (Past HW problems have ranged from 10-30 points, avg about 25pts/each.)
It should work out to something like:
- the algebra is about one HW prob
- the coding is about one HW prob
- the presentation part is about one HW prob

- (4/30) We had a class discussion about HW and final project and grading.
- For homework, two more graded HW sets
- due May 7: Ch 7: 4 and 10
- due May 14: Ch 7: one to be assigned next week, plus one optional one.

If you are doing a project, the optional one can be the same algebra as your final project. If you are not, I will give an optional problem from Ch 7 to work on. - For the final project, I added info to that section.
- (4/24) I posted my solutions to the Lagrangian worksheet. They are added to calendar same day as problems were assigned (4/21), and they are here
- (4/24) I posted the slightly edited equation sheet for Exam 2. (Added the Euler-Lagrange Eq with $x$'s and some parentheses to match how I was writing it.)
- Posted solutions to last HW set: 3-28 and 11 from worksheet on 3/19. Graded them and sent them back to you.
- (4/14) In class, we agreed to postpone Exam 2 until Tuesday, 4/28.
- (3/24) The College has privacy concerns about youtube, so I put today's recording in our shared google drive folder. (It actually didn't take too long.) I made a new subfolder called zoomRecordings.
- (3/19) Posting the recordings to youtube is far and away the fastest thing I've found. I made them "unlisted" so that you can only find them with the link. Let me know if you'd like that changed. (Links will be in calendar with day recorded below.)
- (3/15) As you know, the College has suspended all in person class meetings at least through Easter Break. I've added links to class meetings and office hours above.
- Welcome to the course!
- The textbook is chosen! (See Class Info)

Section

Topic

Homework

5/21

Ch 2-3, 5-7, App C, App F

5/14

Ch 2-3, 5-7, App C, App F

Review for Final Exam

my review notes

cover pages for final exam

review problems

my solutions to (most) of the review problems

Colab (jupyter nb) of Fourier problem

my review notes

cover pages for final exam

review problems

my solutions to (most) of the review problems

Colab (jupyter nb) of Fourier problem

Ch 7: 24 and one optional problem. The optional problem should be either 7-26 or the algebra for your project.

5/12

Student presentations

5/7

7.8-10

T, cons laws revisited, canonical eqs.

video still loading to google drive

notes from class. I found the error I made with sums. Corrected with red * at left side of page.

video still loading to google drive

notes from class. I found the error I made with sums. Corrected with red * at left side of page.

Ch 7: 22, 24, 26

Ch 7: 4, 10

my solutions

my solutions

5/5

7.3-7

gen coords, equiv to Newton's Law

video uploading to google drive (2nd try)

video uploading to google drive (2nd try)

Ch 7: 9, 12, 18

4/30

Discussion, see announcements

Ch 7: 4, 10

4/28

3.8, 6.1-3,5, 7.1-2

4/21

6.5, 7.1-3

first Lagrangian Problems. Pleast try these, and I'm happy to work on them in class together next time.

my solutions

my solutions

4/9

Spring Break

4/7

Spring Break

3/31

5.1-2

3/26

5.1-2

Intro to continuous mass distributions

Text 5-7. Try integrating your answer to 5-7 to get the $\vec g$ I derived in class.

Added graph to 3-28: please use MATLAB or Python to graph a LOT of terms of your solution and see how close it gets to a square wave. If you use Python, I'd greatly prefer a Jupyter Notebook. Google Colab hosts for free--you don't need to install anything to use it.

Added graph to 3-28: please use MATLAB or Python to graph a LOT of terms of your solution and see how close it gets to a square wave. If you use Python, I'd greatly prefer a Jupyter Notebook. Google Colab hosts for free--you don't need to install anything to use it.

3/24

5.1-2

We discussed problems 10, 11, 12, and 8 from last worksheet (3/17)

zoom recording

zoom recording

3-28, 11 from worksheet last time,
watch this video intro to continuous mass dist.s

3/19

5.1-2

Intro to gravitation

zoom recording part 1

zoom recording part 2

problems

my solution to 11 from worksheet

zoom recording part 1

zoom recording part 2

problems

my solution to 11 from worksheet

3/17

3.8

Finish worksheet, 3-28

book solution 3-28

my solution for 3 from worksheet

my MATLAB code to plot answer to 3 from worksheet

graph of 3 F(t) for 100 terms

book solution 3-28

my solution for 3 from worksheet

my MATLAB code to plot answer to 3 from worksheet

graph of 3 F(t) for 100 terms

3/12

Ch 2, App C, Ch 3

3/5

Ch 3

2, 3, 4 today's worksheet, Ch 3: 7, 13, 25

Arya 2.9, and our 2-25 (which was also on
this worksheet from 2/20.)
my soln 2-25

2/25

Ch 2

Catch-up day: Prob 4 from 2/13 handout,
C-2(a-c), 2-32, 2-26, New Problem 01 (see below calendar)

2/20

2.5

Conservation Laws

Some derivations and practice problems

Some derivations and practice problems

Go over all the handouts and choose any inClass problems we should still do

2/11

Ch 2

Intro and overview

Kinematics Review

Kinematics Review

Do Problem 2-3

If you would like to read ahead, check out sections (2.1-2,4) on next date.

If you would like to read ahead, check out sections (2.1-2,4) on next date.

- New Problem 01: A particle of mass $m$ experiences a net force of $mAe^{Bt}$
(where $A$ and $B$ are positive constants.) Find the equation of motion, $x(t)$

My Solution: two ways