2007 - 2008 Syllabus
and Course
Expectations the official
time
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Walker physics website
AP
Physics and FAQ/practice AP
problems
North
Carolina Physics Curriculum
How Stuff Works! and How Things Work
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January 28 |
January 29 |
January 30 |
January 31 |
February 1 |
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we'll do in class |
5(37) and 6(24) |
elevator
lab lab
A8c: we measure the acceleration of the bryan elevators |
kinetic
and static friction labs |
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(always done before class) |
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example 5-9 (Toboggan to the Bottom) |
kinetic friction know the MAGNITUDE and DIRECTION of this force what are the units of mk (mu-k)? fwhat does it mean if mk is big? if it small? |
know the MAGNITUDE and DIRECTION of this force |
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presentation |
prelab
in the lab book that has A5/A6 in it |
5(33),
except change the scale reading in the problem to 530 N |
prelab
to lab A7 part A prelab to lab A7 part D both in the lab book that has A2/A4 in it |
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homework (by 5 pm) |
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5(51) |
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lab A7 parts A and D ONLY |
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January 21 |
January 22 |
January 23 |
January 24 |
January 25 |
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block B: bring your lab book so that you can work on A6; see below.... I will give you some time do work on last Friday's lab |
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we'll do in class |
blocks
F/G have a test on chapters 2, 4 |
block B has a test on chapters 2, 4 | |||
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(always done before class) |
5(7) .... find what they did that violated our problem-solving procedure |
5(7) .... find what they did that violated our problem-solving procedure |
page 126 - 128 |
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| in-class
presentation |
block
B ONLY: (the following should take 10 minutes, I think?)... each person should do these individually.... the group does NOT need to meet the minimum that you should come to class with is: 1) your acceleration data averaged for each of your 5 runs 2) calculation of the 5values of YOUR independent variable (the one that you varied in YOUR experiment) that you are going to plot on the horizontal axis (in order to make your plot linear) 3) calculation of the independent variable that you KEPT CONSTANT in your experiment all of the above calculations should be in SI units the two independent variables (the one YOU varied and the one you didnt are, of course, the two discussed in the prelab)... make sure you get them right! remeber that g = 9.81 N/kg in lab!!!!!!!!!!!!! |
blocks
F and G: see Monday slot <-- |
Question 5(8), p.134 |
Problem 5(29) |
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homework (by 5 pm) |
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this is a fairly challneging problem for our first one using the yellow card as our guide (make sure that you have it out when you do this and future problems!).... unfortunately there are no easy ones in our text.... you must do a force diagram for each mass (as the yellow guide says) use mT and mH for the names of the masses (T for table; H for hanging) be careful about the directions you define as positive why must you have two separate force equations for mT ? |
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January 14 |
January 15 |
January 16 |
January 17 |
January 18 |
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what we'll do in class |
more
examples of N's three laws inventory of forces |
get
lab book ready for A5 put title in at ToC and first page of lab; read up through the 1st of the 5 parts (where you make a prediction of the acceleration of a cart on the flat air track) |
I'll
ask you: what conclusions can we make from the lab we did yesterday? (what conclusion can we make from part 1 alone? what, from comparing the results of parts 2 and 3? what , from comparting the results of parts 2 and 4? what from part 5? |
all blocks do lab A6 block B, I will be there by 7:45 am if you choose to come early (or by 9 am if we have a "weather" day, but i do expect) |
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(always done before class) |
know how to express the most concise versions of Newton's 3 laws |
but make sure you have mastered the chapter 5 reading so far read lab (except ignore computer instructions until we actually do the lab) to get general gist of what we are going to do |
review the definition of weight (and how to calculate it): pp. 124 - top of p.125 short, but important, new reading: from equation 5-1 on page 111 up through Exercise 1 on page 112 |
page 150 (read the text and figure captions) beginning of section 6(3) [page 154 ] up through the middle of page 156 there will be 5 questions I will ask that test the reading |
note that two different experiments will be done (although each group will do only 1 of the 2 experiments) know the dependent and independent variables for each experiment (since you wont know which experiment you will do until you get to the lab room) |
| in-class
presentation |
4(52) |
Question (not
problem!) 5(1) on page 132 use Newton's laws explicitly as explanations for your answer! |
in
your lab book: prelab to lab A6 (this should take fewer than 10 minutes.... think about the glider-picket fence-hanging mass combination as a single object, and use Newton's 2nd law) |
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homework (by 5 pm) |
4( 37 ) (you had a busy week in physics last week, and i'm sure that you are practicing for next week's test on your own) |
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5(10, 12) on page 134 be sure to use N's laws explicity as part of your explanation! |
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question 5(11), p. 134 this question has 2 parts -- make sure that you answer both: 1) why is the horse's logic faulty? and why isnt the net force on the cart = 0? 2) assume that the horse/cart actually do accelerate; what force (by whom? on whom?) actually DOES accelerate the cart forward? what force accelerates the horse forward? i'm sure force diagrams will help explain your answer! and, as before, use N's laws wherever relevant solutions (including diagrams) to questions 5(10, 12) are posted so that you can see what i'm expecting |
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the egg drop (from emily baker) the pen-in-the-bottle on top of the hoop (from jake feimster) (the movies, to be uploaded on monday, can be played with quicktime, although apparently not frame-by-frame.... the best thing to do is drag the scroll bar slowly to see that both the pen falls exactly vertically... do the eggs? |
walk around quiz due (but don't wait till the last minute....WAQs MUST be shown to me in person.... they are NEVER left in the black box; if they are, a grade of zero results)... try to finish and show me on monday, when i'm here till 5:45 after school; to receive credit for WAQs, you MUST take the INITIATIVE to sign the tablet after you show me the solution.... (that's my only record of credit) the recommended tiger- -protection-wall height is 5.0 meters ( = 16.4 ft). Assuming that a jumping (from the ground) tiger just reaches that maximum height. find a) the horizontal range of the jumping tiger (from ground to ground) b) the velocity with which the tiger hits the ground additional info: 0.50 sec before the tiger reaches maximum height, the tiger is moving at a speed of 13 m/s ( about 30 mi/hr) |
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coming
attractions: test on 1&2-dimensional motion next monday/tuesday |
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January 7 |
January 8 |
January 9 |
January 10 |
January 11 |
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blocks
F/G "free" day; i would suggest you use it finish up the lab A4 for friday block B: you must bring all 5 printed graphs and your lab book... i will give half the class period to you for finishing up lab A4 |
make sure you read the lab and know what the 4 pairs of quantities to be compared are in this lab i will again try to give you half the period for lab, since I didnt yesterday (but you MUST have all your graphs in class today, hopefully already taped in place, with accompanying matching tables) |
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| what
we'll do in class |
more
practice on 2-dimensional motion |
how to maximize the horizontal range of a projectile.... why a projectile shot with a certain speed can hit a target some distance away by being fired at two different angles |
walk around quiz? |
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(always done before class) |
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problems: MAKE SURE you have mastered 4(5) up through example 4-7 |
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chapter 4 summary |
you will memorize important definitions and laws, and write them from memory in class |
| in-class
presentation |
4(59
part a ONLY but also find the final velocity (i.e., the velocity with which it hits the ground) beware the bipolar units |
4(33) |
4(57) the scotch broom problem |
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homework (by 5 pm) |
do the PRELAB for lab A4: even though this is not a typical problem, make sure that you start -- as usual -- with a picture with i/f labeled.... label 2 + directions, write the list of knowns in H and V columns! it's just that for this prelab you won't be using numbers for most of the knowns.... the knowns include vix, viy, and ay.... (and you leave them as letters!) plus you will have at least one zero in each of three parts.... make sure that the max height, time to max ht, and horizontal range is expressed in terms of ONLY those three letters above |
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4(23 B and also find the max height the ball reached above the thrower's hand) (you may not halve the time of part B and use it to get the answer to max ht. you already have 3 knowns without it!) 4(36) (yes, this problem, sadly, has only 1 zero) |
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only 1 problem, as lab is due |
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at 5 pm for block B |
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21, 22, 26, 31, 37 (but also find speed with which she hits water), 39, 41, 43, 44, 59a, 61, 62, 67b, 73, 81 (remember that you may not use equations 4-12 or 4-13 for problem solving, although you are allowed to use the normal dvat formulas to get to that equation) here's the applet I used in class this week; it's useful if you want to check an answer to a problem |
coming attractions: 1- & 2-dimensional test on jan 21/22 during the lab period |
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January 3 |
January 4 |
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| what
we'll do in class |
block
B will do lab so bring your second lab book (the one we did the sonic ranger lab in; you've handed in the air track lab book) since it's a computer lab, also bring a flash drive to save data also, you will need printing privileges in order to get maximum credit on lab you MAY do the lab on your computer if you choose.... you will need to download and install the following programs before class.... the programs are here install these in the following order: graphical analysis java (the file beginning with jre....) quick time tracker |
blocks F/G do lab (see yesterday's slot) you buy printing privileges in the library (in blocks of $5) and no, i dont know how much that buys you... ask at time of purchase |
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(always done before class) |
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blocks F/G: look at 1 of the drops and 1 of the launches here QuickTime will open the movies, as will other media software you may have if you have time: prepare lab book for lab A4 read the first two pages of lab A4 the drops and launches were performed on a tilted frictionless air table (sort of like an air hockey table) |
| in-class
presentation |
4(11
part a only!) |
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homework (by 5 pm) |
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both 4(11a and 15) should take 10 minutes each |
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