Use four letter notation to identify forces. For example: Fgeb = Force of gravity, earth on ball.

Arrows represent forces. The size of the arrows should approach the general size of the forces. The direction of the arrows should accurately represent the direction of the force involved.

page II-5: Free body diagrams row with stick figure and boxes 1 & 2 (all three)

page II-6: part a

page II-9: all (Free-Body Diagrams-1)

page II-10: all (Free-Body Diagrams - 2)

Note:I will be at a meeting Tuesday. You will have to read stuff and read it to understand and apply it to do some things on Tuesday. Don't throw that time away. Be positive. Be motivated. Be responsible for your own learning.

Tuesday, 10-06-09:

In Class: Pair up with someone and compare your Free Body Diagram Packet Work

Homework:

Read 4.1 (Forces) pg 81-top of 83 & 4.3 pg 84-87 Sections on Newton's Second Law.

Record Notes on section, and notes MUST include:

Prediction for content.

Two things you had already knew.

Two things that are new to you.

Finish all the Free Body Diagram Worksheet Problems, it's due tomorrow (Wednesday 10/7)

The arrows must be of appropriate size and direction, and it must be labeled correctly.

Unit 3, Introduction to Forces Worksheet 2, Force Diagrams

g is the gravitational field strength of Earth. turns out for us it is roughly 10 Newtons of force per Kg of mass. That means Earth exerts a gravitational force of 10 Newtons on every kg of mass. g=10N/Kg

Chair Lab:

draw the free body diagrams for each chair & student pull. By stating chair & student, I am trying to state that my SYSTEM is both the chair & the student. I mean I am analyzing the motion of the chair and student combined.

State how the F(total-y) and the arrows in the y-direction relate to the motion of the system vertically.

State how the F(total-x) and the arrows in the x-direction relate to the motion of the system horizontally.

If possible, get a Helium filled balloon to use in class on Friday & for a home-lab over the weekend.

Friday, 10-09-09:

In Class:

Review parts of yesterday's worksheet.

Review F(gravity) = mg

Review N2L in component form.

Begin Buoyancy Lab.

Homework:

Graphical Addition of Force vectors worksheet: do this GRAPHICALLY when asked.

Finish (or begin and finish) Buoyancy lab.

determine the buoyant force on a helium balloon.

DO Helium balloon car lab.

roll windows up, turn fans off.

put balloon in back seat so that the balloon does not scrape the roof, doors, or seats.

make a prediction for what will happen when you:

speed up going forward

go at a constant speed forward

slow down going forward.

drive in a clockwise circle

drive in a counterclockwise circle.

Now that you've made a prediction, test it.

NOTE: WHEN YOU DO THIS, do this in an empty parking lot. Do NOT do this while driving city streets or highways. Feel free to bring your family with you.

Monday, 10-12-09:

In Class:

Review:

Balloon & buoyancy

Balloon & car lab

Chair lab

Graphical addition of forces

N2L

Homework:

From worksheet you already have: Unit IV: Worksheet2 - do the rest of # 5&6 on back.

Tuesday, 10-13-09:

In Class:

Students can team up to compare their solutions to the homework

Student should do #'s 4-8 from the Unit IV worksheet 3 (you should already have this worksheet)

Homework:

Read 4.5 & 4.6. Do NOT focus on the sample problems. In fact, do NOT read the sample problems.

Take notes on the text.

Take notes on the figures within the text (NOT the sample problems).

Wednesday, 10-14-09

In Class:

Review Unit IV WS 3 number 4.

Homework:

Skip numbers 5 & 6 for now.

Do numbers 7 & 8 from Unit IV WS 3.

Thursday, 10-15-09:

In Class:

Review UIV WS 3 #7

Homework

Do Problem Set 4.1: Chapter Review Problems: #1,6,7,12,16

Ch 4 Section 6 Some of the samples are worthwhile for getting a feeling for things. Think about both friction & Newton's Second Law when reviewing the samples.

We will Plot F(normal) vs F(friction) of the object that is being moved with glider or plastic base.

We will use either spring scales or force sensors attached to the computer to measure the force of the pull.

Draw a free body diagram of the glider pad with a weight on it being pulled at a constant speed.

Draw a free body diagram of the glider pad with a weight on it being pulled with a changing velocity.

A glider pad with a weight was pulled, but is no longer being pulled. It was moving at some velocity, now it is coasting down to a stop. Draw a free body diagram of the glider pad with a weight when it is no longer being pulled, but is coasting to a stop.

What will you measure, how will you calculate or determine F(normal)?

How will you determine F(friction)?

Homework:

Do Pre-Lab

Finish PS 4.2

Read Friction & gravity stuff from book.

Wednesday, 10-21-09:

In Class:

Rvw #35

Begin Magic Glider Lab

Homework:

MAKE SURE THE PRE-LAB QUESTIONS from Tuesday are done in your lab notebook.

Use the pre-lab questions to determine how you will measure F(friction)

You got a "Changing Representations" worksheet. Do the following

Changing Representations 2, page II-38

Changing Representations 5, page II-41 letters b & c

Changing Representations 9, page II-45, right hand column

Note: when they say apply Newtons Second Law (N2L) in component form, they mean do N2L in the x-direction. Then do N2L in the y-direction. That means do something like:

Pick another problem from the Changing Representations w.s. to do. Your pick.

Friday, 10-23-09:

In Class:

Finish plotting data.

Should the y-intercept = 0? If yes, then (when inserting the line of best fit) you can click a box to force it through zero. If no, then leave the line be.

Rewrite the equation for the slope of the line from y=mx+b to the actual values. Recall that the line on a position vs time graph is y=mx+b, but in that case it becomes d=vt +d(original). There is also a meaning for the y=mx+b graph of friction vs normal force.

Determine the value of the slope of the graph. What does that represent?

How would you change the slope of the graph?

How would you change the y-intercept of the graph?

Compare your data to other groups. How close are the values?

Homework:

Remember I will be out on Friday. You should be ready to finish the lab & work on the homework problems below.

Data section should include your raw data, AND a printout of your graph. copy & paste graph into word so you can get two graphs on each sheet of paper. attach the graph to your lab notebook.

Analysis:

We did this to get acceleration (or that to get F(friction)).

Plotted friction vs normal. Best fit line gives us the other.

Coefficient of friction is this.

Would do that to change the slope.

Would do this to change the y-intercept.

Our data appears good, bad, or ugly when compared to other student group coefficent data.

Sources of uncertainty include things like how we measured that deal with the stuff, the stuff on the deal, how the thing went like that. We'd reduce these uncertainties by having a thing like this (that wouldn't cost any money).

Conclusion:

we measure this got that plotted and found coeficients by using this thingy.

our data appears to be good/bad by comparing it to values in tables and classmates.

this class is awesome.

*

Monday, 10-26-09:

In Class:

Review Magic Glider Lab.

Work on Unit V, WS 4 #5 in class

the word 'gravity' can no longer be used unless in one of the following phrases, "force due to gravity", or "gravitational field strength". Use of the word gravity, lacking these phrases will result in 75 demerits, 10 push-ups, 5 burpees, and 15 deep knee bends. And your lab partner can help you out.

Homework

Finish Unit V, ws 4

Study for test on forces this Wednesday

Tuesday, 10-27-09:

In Class:

clarify h.w. assignments (PS 4.1, 4.2, the worksheets, & hw listed above should be ready to turn in Wednesday)

rvw UV, ws4 #1

rvw vectors, forces, and vector addition, vector resolution,

No Lulai to talk to. You've gotta be ready to do it.

Plan what to measure.

Plan how to measure the stuff you will measure.

you will need to determine the angle the leash makes with the vertical.

you need to time stuff.

you need to measure some distances.

Should F(tension) be <=> F(gravity-pig)?

Read about a(centripetal), F(centripetal), v(tangetial)

Chapter 7, sections 3 & 4

there are a few ways to go:

a(c) = a(net radial) = r x w^2 = v(tangential^2) / r

v(tangential) = 2pi r / T = r x w

note 2pi x r / T is the circumference of the circle divided by the time it takes to travel the circle. it's distance divided by time.

Friday, 10-30-09:

In Class:

Lulai left us all by our lonesome :)

Worked on flying pig lab

Homework:

Monday, 11-2-09: (updated by kristina)

In Class:

discussed/finished flying pig lab

Homework:

car is on a banked road. draw a free body diagram for A) the car parked on the road and B) the car zooming at gazillion mph on the road

it looks sorta like this. the car is angled on the banked road. it's facing forward.
<---- lulai is putting in extra hours to save up for one of these. a minivan would just cramp his style

the flying pig returns....

we are now trying to collect the flying pig's poop. measure the height of your pig as it flies above the ground. determine the circumference of fence needed to enclose the poop as it is expelled from the flying pig. i think lulai said to assume that the poop is going straight down, but i'm not quite sure.....

Tuesday, 11-03-09:

In Class:

Rvw Flying Pig

Begin 9-1 physics packet w/ clickers

Homework:

Finish the pig poo catcher. Remember that things dropped from the pig do have an initial velocity in the horizontal direction.

Do worksheet packet titled "9 Impulse and Momentum"

#1-7, 9-13

We will now be moving on to the Momentum page.
For information after 11-05-09, go to the Momentum page.

----Old Stuff----

Friday, 9-26-08:* In Class: Do N3L (newton's third law lab). Rvw W.S on free body diagrams. Note:* Check the packets for information on free body diagrams.* Check your book for information on free body diagrams and check the Mullins noteson forces.

I prefer the notation where each force is labeled with an upper-case F and followed by subscripts that remind us what forces we are discussing. For example Fg-b (where g-b would be subscripts) for Force of gravity on the ball.

Prep for Force Statics Sign Hanging Lab (problem solving lab- you should have a method prepared to do the lab tomorrow).

Begin Problem Set 4.2: Ch 4 Rev Probs #15 (more coming, but #15 is a good start & should tie in nicely with the lab).

We've covered much of the material in 4.1, 4.3 (except universal gravitation), 4.4, & 4.5 These would be good sections to review. We've addressed them through classroom discussion, worksheets, labs etc...Reading them wouldn't hurt. Taking succinct notes would probably help.

Friday, 10-03-08:

In Class:

Rvw #15

Do Hanging Masses Lab

Homework:

Problem Set 4.2: Add #16-18

Note: Systems that have an acceleration = 0 are called STATIC SYSTEMS.

Monday, 10-06-08:

In Class:

Work on Changing Representations w.s.

Homework:

Do Changing Representations #5 a,b; 7; 8 left, right;

Tuesday, 10-07-08:

In Class:

Rvw Changing Representations #7

Rvw PS 4.2 #18

Do a couple of clicker questions

Homework:

Read 4.6 (the section on friction for sure, I think it was 4.6)

Take Notes on the reading.

Explain each figure or sketch in the section (excluding those in sample problems).

Thursday, 10-09-08:

In Class:

Work on Magic Glider Lab.

Plot data.

Homework:

Finish problem set 4.3: Ch 4 Problesm 35, 37, 39. add problem # 40, 42

Note:

Remember I will be out on Friday. You should be ready to finish the lab & work on the homework problems below.

Monday, 10-05-09:Tuesday, 10-06-09:

In Class: Pair up with someone and compare your Free Body Diagram Packet Work

## Homework:

Wednesday, 10-07-09Thursday, 10-08-09:F(gravity) = mggis the gravitational field strength of Earth. turns out for us it is roughly 10 Newtons of force per Kg of mass. That means Earth exerts a gravitational force of 10 Newtons on every kg of mass.g=10N/KgFriday, 10-09-09:NOTE:WHEN YOU DO THIS, do this in an empty parking lot. Do NOT do this while driving city streets or highways. Feel free to bring your family with you.Monday, 10-12-09:Tuesday, 10-13-09:Wednesday, 10-14-09Thursday, 10-15-09:http://www.msnbc.msn.com/id/32760311/ns/technology_and_science-science/> (contributed by kristina)Monday, 10-19-09:Tuesday, 10-20-09:Wednesday, 10-21-09:Thursday 10-22-09:Friday, 10-23-09:*

Monday, 10-26-09:Tuesday, 10-27-09:Wednesday, 10-28-09:Thursday, 10-29-09:Friday, 10-30-09:(updated by kristina)Monday, 11-2-09:- In Class:
- discussed/finished flying pig lab

- Homework:
- car is on a banked road. draw a free body diagram for A) the car parked on the road and B) the car zooming at gazillion mph on the road

it looks sorta like this. the car is angled on the banked road. it's facing forward.<---- lulai is putting in extra hours to save up for one of these. a minivan would just cramp his style

- the flying pig returns....

we are now trying to collect the flying pig's poop. measure the height of your pig as it flies above the ground. determine the circumference of fence needed to enclose the poop as it is expelled from the flying pig. i think lulai said to assume that the poop is going straight down, but i'm not quite sure.....Tuesday, 11-03-09:Wednesday, 11-4-09Thursday, 11-05-09:- In Class:
- Rvw WS 2 & 3

- Homework:
- Read Ch 6 Section 1
- Do worksheet packet titled "9 Impulse and Momentum"
- #1-7, 9-13

We will now be moving on to the Momentum page.For information after 11-05-09, go to the Momentum page.

--------Old Stuff* In Class:Friday, 9-26-08:Do N3L (newton's third law lab).Rvw W.S on free body diagrams.Note:* Check the packets for information on free body diagrams.*Check your book for information on free body diagrams and check the Mullins noteson forces.I prefer the notation where each force is labeled with an upper-case F and followed by subscripts that remind us what forces we are discussing. For exampleFg-b (where g-b would be subscripts) forForce of gravity on the ball.Homework:On the new packet try:Page Column PortionII-9 all allII-12 middle allII-13 middle allII-14 left allII-15 top row aMonday, 9-29-08:Rvw N3L labRvw Forces are when two objects Interact.Rvw Free Body DiagramsRvw questions from Friday.:Do Unit IV: Worksheet 1Tuesday, 9-30-08:Wednesday, 10-01-08:Thursday, 10-02-08:Friday, 10-03-08:Rvw #15Do Hanging Masses Lab:Problem Set 4.2: Add #16-18: Systems that have an acceleration = 0 are called STATIC SYSTEMS.Monday, 10-06-08:Work on Changing Representations w.s.:Do Changing Representations #5 a,b; 7; 8 left, right;Tuesday, 10-07-08:Thursday, 10-09-08:add problem # 40, 42Tuesday, 10-14-08:In Class:Wednesday, 10-15-08:In Class:Review Circular MotionFinish Flying Pig LabHomework:Finish P.S. 7.1Do Ch 3 packet (skip #6)Monday, 10-20-08