October
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An outline of topics to be addressed each day is presented below. This list is not complete; additional items are covered for most classes. If students are absent, they should consult these pages and check with the instructor concerning material missed.
Last Month
Last Month
Last Month
¢ Review Exercise
ð Kynsey: Today, 8th Period
ð Ryan Clark: Tuesday, 6 October, 8th Period
¢ Solution for the donut exercise
¢ Discussion-solution of some problems from chapter 5: Circular Motion; Gravitation
¢ Schedule: a chapter behind - may make up by having a virtual lab for the next one
¢ Next scheduled lab:Centripetal Force - demonstration
¢ No Class - In Service
¢ No Class
Tuesday (Double Period)
¢ Ryan: Review Exercise 8th period - will be graded later this week
¢ Schedule: check periodically, I do not provide daily, by page, etc, reading assignments - check the schedule and stay up with reading IAW
the schedule and my presentations
¢ Discussion-solution of some problems from chapter 5: Circular Motion; Gravitation: 16 problems solved and summarized
¢ Chapter 6 Work and Energy: We start next class - begin reading the material and working through the example problems - as with all of the chapters,
at least 10-15 problems will be worked in class
For next class, in addition to looking at the examples in the text, look at the following problems - I will discuss in class
Page 160: Questions 1 through 6
¢ Lab 2-1: Centripetal Force: 2 teams at a time to the lab downstairs
ð Develop a form to collect data before you go - I must initial this form before team leaves lab area - this form must be turned in with you lab
ð Follow instructions concerning titles of lab paragraphs - use the ones given - points deducted if instructions not followed
ð All data must be submitted - points deducted if instructions not followed
ð Teams let me know when you are ready to go
¢ Discuss solution to Review Exercise
¢ Chapter 6 Work and Energy summary
¢ Work on Exercise 2-1 or Lab 2-1
¢ Assignment for Friday: Presentations by Team
¢ Started grading the Review Exercise: Comments on the first 3 pages (2-4), 5 to go. Some initial comments:
ð On the last Review Exercise only 2 students got the 2 major components of physics question correct. This time only 1 student missed it - making
progress!
ð Some students cannot define a newton
ð A reference frame attached to an accelerating train is a classic example of a non-inertial inertial reference frame
ð Free-body diagrams look good. Guess what "draw the 2 diagrams" means.
ð Some students cannot read a friction versus force diagram (cannot read diagrams, perhaps?)
Those that confused D with B and E with C were given credit. The college board probably would not have (Review Exercise)
ð Read the problem requirements. A lot of points are lost on the AP exam because of a failure to do this
Insert values and units but do not need to solve for a numerical value means just that
Do not leave answer as an equation with no values or units inserted
¢ Additional problems from Chapter 6 Material
¢ No Class
¢ Grades
ð Grades on second review exercise ranged from 70 to 98
ð Marking Period grades were weighted as follows; MPGrade1 = (average of exercises and labs)*4 + (average of review exercises*6)/10
ð To obtain the final quarter grade, 20% of points lost were returned: MPGRADEFinal = MPGrade1 + 0.2(100-MPGrade1)
ð Quarter grades ranged from 85 to 97
¢ Your grade for the Review Exercise is circled _ Your quarter grade is at the top and listed as MP =
¢ Schedule: check periodically and stay up with the reading assignments IAW the schedule and my presentations in class
¢ Finish Chapter 6 Work and Energy
¢ Assignments due today or tomorrow
ð Lab 2-1, Centripetal Force due today - note that problem solution hints have been provided for consideration
ð Exercise 2-1, Chapter 5, Circular Motion, due next class
¢ Exercise 2-2, Chapter 6, Work and Energy
¢ Review Exercise on chapter 5 and 6 next Wednesday - 21 October
¢ Start Chapter 7: Linear Momentum next class
¢ Be on time - violations being reported
ð Tardy - 4 minutes
ð Absent - 10 minutes late
¢ Read the problems
Define a newton without using symbols or an equation (and by implication, an equation in words is an equation equivalent) means just that.
¢ Review Exercise on chapter 5 and 6 next Wednesday - 21 October. As is the case with all exercies will contain material from earlier chapters
¢ Practice for multiple-choice portion of the AP exam yesterday-7 multiple-choice questions - will post solutions later
ð 1 student got 2 correct
ð 5 students got 1 correct
ð 9 students got 0 correct
¢ Will be at Computer Science Museum and Planetarium with Astronomy class Friday - work on assignments or read chapter 7
¢ Team assignments
ð As explained earlier, adjustments are going to be made to teams
ð Some team arrangements may be done by me for fairness considerations
ð They will be made tomorrow or Monday.
ð If you would like to change teams, send me an email at alpcentauri@gmail.com - state who you would like to team with if you wish
do this today - it will be confidential
¢ Assignments due today: Exercise 2-1, Chapter 5, Circular Motion
¢ Solution for multiple-choice questions
¢ At Planetarium and Computer Science museum with Astronomy class
¢ Work on assignments or read chapter 7 or study for Review Exercise to be given next Wednesday
¢ NAME, DATE, LAB or EXERCISE NUMBER ON ALL ASSIGNMENTS
ð May not be accepted if not followed
ð Points will be deducted if accepted
¢ Review Exercise on chapters 5 and 6 Wednesday - 21 October. As usual, material from earlier chapters will be included
¢ Lab 2-1 graded and returned. Good work on the labs so far - different approach for the next one - see below.
¢ Schedule: check periodically, I do not provide daily, by page, etc, reading assignments - check the schedule and stay up with reading IAW
the schedule and my presentations
¢ New lab teaming arrangements
| Team | Members | |
| 1 | Kynsey, Emma, Bobby | |
| 2 | Amanda, Molly, Jason | |
| 3 | Katie, Daisy, Elora | |
| 4 | Spencer, Nick, Ben | |
| 5 | Ryan H., Ryan C., James | |
| 6 | Elliot, Jeremy |
¢ The multiple-choice quiz - no points deducted
ð Pass back papers
ð Solution
ð 1 student got 2 correct
ð 5 students got 1 correct
ð 9 students got 0 correct
¢ A quote from the College Board reference preparations for the AP exam
Aim to learn and understand thoroughly the physical principles that are the basis of physics.
By mastering the underlying physical laws, you can solve a great variety of complexly worded or purely theoretical questions.
Don't be content to learn physics strictly as a computational process.
This is the approach that I folllow in all of my courses.
It is not the math or the problem that is the difficult part - the difficulty arises in trying to solve a problem (just crunch numbers) without a firm knowledge of the underlying laws, etc.
¢ Lab for next class: we will not be going downstairs for this lab
¢ Start Chapter 8: Rotational Motion Thursday
Tuesday (Double Period)
¢ Lab 2-2: We will not be going downstairs for this lab - instructions concerning access of the virtual lab portion
¢ Work on lab or review for the Review Exercise to be given next class
¢ Review Exercise on chapters 5 and 6 postponed to next Friday.
¢ Yesterday the same team asked the following questions
ð What is supposed to be accomplished by the experiment in the Open Ended lab? Answers I provided are repeated below
Answer - read the problem and recall my detailed earlier explanation
ð How do you measure temperature with a scale?
Anwer - have you ever heard of an analogy?
ð What was the distance for the lab you demonstrated?
Answer - you were instructed to pay attention and write down the distance measured by Amanda - you were apparently talking and not paying attention
ð How can the problem be solved for the demonstration since time was not given
Answer number 1
That is part of the problem
Answer number 2
You are in an AP course - it requires some thought and effort See next note
Apparently, some time ago, AP Physics B had a reputation for being an easy course that a student could get a good grade in without any effort. Perhaps it was not being taught as an AP course then....
¢ Reminder: The Academy has a dress code policy. The student that I had to correct in this class yesterday was reported, as will be all future violations
¢ As I have said many times, for all labs or exercises you are to place name, date, and lab or exercise number at the top of the page.
Starting with Exercise 2-1 4 points will be deducted for violations (there was a deduction for 1 student on Exercise 2-1)
¢ 4 points per day for late submissions.
If you have not submitted the required (stated many times) note to me to explain absences by the time I grade the paper it is then too late
¢ Some that are not already doing so may want to consider following instructions - at least with this teacher
¢ Solution for exercise 2-1 will be posted and discussed next class
¢ We start rotational motion next class
¢ We start Chapter 8: Rotational Motion next week
¢ Review Exercise next class on material to date through chapter 6
¢ Review Exercise will be given next Tuesday
¢ Chapter 8: Rotational Motion
¢ No Class - Review Exercise will not be issued to anyone today
¢ Review Exercise
¢ Schedule: check periodically, I do not provide daily, by page, etc, reading assignments - check the schedule and stay up with reading IAW
the schedule and my presentations
¢ Schedule: check periodically, I do not provide daily, by page, etc, reading assignments - check the schedule and stay up with reading IAW
the schedule and my presentations
¢ Extra credit problems
¢ Exercise 2-1 graded and returned
ð Some are not carefully reading the problems. Problem 9 asked a question about independence of mass - some did not respond. See previous comments...
ð Show all work!
ð Some student(s) did not do all of the problems
ð Students had difficulty with problem 28. Some of the problem was physics, some was not carefully reading the problem - see above notes.
ð Note that On Time or Days Late notes are being placed on assignments - if note (in accordance with my stated - many times - policy has been received
before papers are graded) then allowance is possibly made
ð 4 points being deducted for students at this late date that are still not placing name, date, lab number at top of all assignments in accordance with
instructions repeated many time
ð 7 total problems, weighted equally, counted 5 points per problem. Grade is indicated with an arrow.
ð Raw scores ranged from 0 missed to 41/2 missed
¢ Exercise 2-2 was due 10-20
¢ Check status of assignments frequently, nothing is graded until all submitted or I set a cut off date and solutions posted
¢ Check solutions and see me the next day if you have a problem with grading or solutions - other than an obvious numeric error
¢ Exercise 2-3 on Chapter 7: Linear Momentum
¢ Review Exercise 2-1 solution
¢ Chapter 8: Rotational Motion
¢ Will be at Planetarium tomorrow - work on assignments
¢ Assignments not yet submitted
ð Lab 2-2: 2 teams
ð Exercise 2-2: 1 student
¢ Conservation of momentum
ð Demonstration
¢ Chapter 8: Rotational Motion
¢ Lab 2-3 for next week: Partial description
¢ At Planetarium today
¢ Work on the exercise for Chaper 7 (Exercise 2-3)
ð Note the solution suggestions provided.
ð 1 problem has been deleted; it will be solved in class as an introduction to the next lab
¢ A suggestion was made that optional, extra credit assignments be given. The first one is optional exercise 2-3a
¢ Note changes in the next lab ( Lab 2-3) - part of the lab has been removed and listed as the above optional exercise 2-3a