the calm before the storm .

Hey guys, sorry for the very late post. I can go on and on and on explaining why I didn't post it last night, but I won't, because.. scribe posts aren't for excuses.


MM, a couple of days ago we started a lab about inclines (I believe Joseph talked about it enough). Yeesterday, we worked on the calculations part of the lab. There was a whole table you had to complete, a graph to draw, and the the questions on the last page to do. That's what we worked on yesterday basically.

Ms. K also posted up the answers to the two worksheets she gave us long time ago, the Chapter 5 Review and the Dynamics Problems. She told us that the questions we don't need to know (for the test I'm assuming) is boxed in blue. So.. you should've corrected your answers already, and yeah..


That's it.

Test next period. Good luck! =)

Next scribe is Lorenz.. because he wants to be.

'Kay bye.

Dynamics Problems

Dynamicsproblems

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February 24 2009

Bonjour bonjour le classe!

Tres class today, tres class. First off, it's nice to see our teacher decide to actually attend class today, i'm Inclined to know if she'll be present for tomorrow's class as well!

Did you catch that? Did the colour isolation give it away?

OUI, OUI! Our class today is all about Inclinations!! (probably not the correct term...)
So I guess i'm INCLINED to tell you the details of today's emotional INCLINE of a class, so let's begin! Don't worry, I don't have any material left for incline puns, but goodness, if i did, it'd be a CLOTHESLINE! (i hope you got that) Okay enough PUNCHLINES (that was another), I think I'm out of LINE now (another), let's begin INCLINES!

Lemme break it down numerically:

1. Corrected Transparency Worksheet
Solutions:
1. vector resolution
2. F is a single vector acting in a certain direction. Fv is a vertical component of F. Fh is a horizontal component of F. Fv and Fh are perpendicular to each other.
3. /
Fh <------/
4. F^2=Fh^2+Fv^2
5. Fv will increase, Fh will decrease
6. Both sets are components of a single vector. Fh is perpendicular to Fv and F(parallel) is perpendicular to F(perpendicular)
7. Gravitational force of Earth acting on the object. W is directed downwards towards the centre of the Earth.
8. F(parallel) will decrease and F(parallel) will increase
9. F(parallel)=Wcos(theta)
10. Fn

2. An experiment was held observing the different factors that can overcome friction on an incline plane. Factors such as the degree in which it is orientated towards the horizontal table, the different weights the object is attatched to, the weight of the object itself, and the way the object is placed upon the incline such as on its broad side, or it's narrow side, or if it's placed on a sheet of sand paper.

3. A worksheet was also given out which invlolved Newton's second law, "the force equals the mass multiplied by the acceleration"

4. Bell rings!

That is the summary of the class. Merci merci for ignoring my post cause i know no one's gonna read this. Anyway the moment you've all been waiting for, the next scribe shall be nelsa! Till next time my le classe!

Au revoir!

-le joseph

Monday, February 23, 2009: Worksheet-ful Day

Hiya people! Jasmin's scribing today. Why? Because she's awesome. =D Anywhoots... Once again, today we had a substatute teacher. We had a worksheet-ful day today. We went over 7: Study Guide, Chapter 6: Study Guide, and recieved two new handouts. One was entitled Grade 12 Physics: Dynamics Problems (which is for homework... I think...) and 6: Trancsparency Worksheet that involved a transparency on the over head (which we were suppose to go over during class, but we ran out of time) That's all the class consisted of. Answers for the Study Guides are below. Enjoy! =)

Next Scribe is le joséph (get your bum on the blog!)

Reminder
Dynamics: Forces test
Thursday, February 27, 2009
Room 29, Fourth period, 12:15 PM
Be there or don't be.

7: Study Guide

1. False : equal to
2. True
3. True
4. True
5. False: opposite
6. b
7. d
8. b
9. d
10. b
11. e
12. c
13. g
14. b
15. f
16. a
17. d

Chapter 6: Study Guide

Adding Perpendicular Vectors
- perpendicular
- hypotenuse
- length
- a^2 + b^2 = c^2
- 127.48
- direction
- tan(theta) = opposite/ adjacent
- 11.3 N of E

Components of Vectors
- resultant
- trigonometry
- cosine
- sine
- vector resolution

Adding Vectors at Any Angle
- perpendicular
- 2
- 6
- 3
- 3
- horizontal
- vertical
- resultant

Equilibrium
- zero
- accelerating
- equilibrant force
- equal
- opposite

Gravitational Force and Inclined Planes
- downward
- 2
- perpendicular
- incline plane
- parallel
- accelerated
- increases
- increases
- object
- incline plane
- perpendicular
- coefficient of friction

Last Thursday Scribe

Hey guys, its Paul making my quick scribe post for last Thursday, which I forgot ):

We had a substitute whose name I cant remember. She was nice, and gave us an assignment called Grade 12 Physics: Dynamics. We reviewed the answers in class on Friday. The answers were:

1. 294N

2. 980N

3. 693N

4. 1123N

5. 5.7N per cable, 11.4N total

And thats all folks. Night everyone. I finally scribed in a physics class. Yay <:

022009

Hello classmates I'm the scribe for today.
For those who were not here yesterday we picked up the dynamics worksheet and handed it in for MARKS. So hand it in if you haven't handed it it already.

In class we got so sheets that you'll need to pick up if you aren't here.
- The chapter 6 Study Guide ( you need a physics book for this)
- The chapter 7 Study Guide
- Concept Development Practice Page 5-4
We spent the class working on these worksheets and finishing the dynamics sheet.

The Scribe for For Monday is: Jasmin

Have A good weekend!

February 18, 2009

Hello, I'm Karen and I am your scribe for today. Today's scribe post isn't going to be long, or interesting.

Today in class, we went over the front side of the free body diagram worksheet, and the back side of that worksheet was handed in for marks.
After that, we also went over the Dynamics:Equilibrium Problems Worksheet.

Here are the answers:

1. 319 N
2. 87.3 N
3. 935 N
4. 74 N
5. 244 N
6. 220 N

Questions #7 and #8 were handed in to Ms. K.

That is all. Sorry for the really sucky scribe post. Next scribe is Paul! :)

February 17, 2009

All right ! Time for Sheldon Cooper to scribe. I won’t go super crazy on this post as to put yall in awe though, and my post will also be like John’s and Dion’s which were devoid of effort haha. So we received our Kinematics Test back. Wonderful test was it not Dion =P

So if you scroll down, you will notice that Ms. K posted the answers for the kinematics test. In class, Ms. K thoroughly went over the test. If you have any questions, feel free to ask her about the test ha! The answers below should suffice however. Otherwise, ask friends and classmates.

And for the last question, if you need help, hopefully this post satisfies your needs. The air resistances helps maintain the plain in the air (wind goes underneath wings) so that it will stay up and as you land, it slows a plane down.

We also got "Relative Velocity" back and went through the equilibrium questions. The answers are below as posted by Ms. K.

For 4-1, the answers are respectively as follows (horizontally downwards:
300 300 150
300
100 150 300
500
830
1000

We also have to do freebody diagrams and Dynamics Equilibrium Problems.

The next scribe is karen.

Equilibrium Problems 2-4

Equilibriumproblems1 4

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Acceleration Test

Acctest

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Dynamics

Well it seems that my post will be short too. On Friday we had a sub.

We got a booklet about dynamics, basically telling us how to find forces when an object is at equilibrium(zero acceleration). Then we got 2 works sheets and worked on them. One was a free body diagram and the other was a concept development practice thing.

Yeah... I'm pretty sure that's all we did on Friday, so I'm going to end this by choosing Aldrin to be the next scribe.

Day 4: The Test

Welcome to post 4 of this physics blog! Today was intense!  Yup, that's right, I'm talkin bout our test.  Wow, this may be a short post... Let's see, what did we do today...

We had a test.

The end... hope you all did well!... I don't know what else to say...I don't even know what were going to be covering tomorrow.... 

The night is young! If i think of anything else I shall update my post!!! 

That's all! See y'all in class tomorrow!! Next scribe will be The Johnson!

Third Scribe of the Course

Sorry to disappoint but this is going to be a quick and speedy scribe today!

Thanks to Ms Kozoriz the answers from the last few questions on the Relative Velocities worksheet are up, as well as the answers for the Chapter 4 Study Guide.

We also have to hand in tomorrow (if you haven't already) the other Relative Velocity worksheet we were given yesterday.

Hmm... the only thing that needs to be mentioned now is the test we have tomorrow on everything we've done so far, and if you aren't to sure on what that is, check out the first two blogs and they are very nice and detailed... just for you guys!

Good luck to all of you guys on tomorrows test! & the next scribe will be Dion :)

Relative Motion Problems

Relativemotion

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Second Scribe of the Second Week of the Second second... There's something about that number I guess.

Helloooo... RICOLAAAAAAAAAAAAAAAAAAAAA!!! Just kidding, but I really just did have one. Not for the cough, but the lemon drops just taste good. Soothing for the throat too. Anyhow, as you all ladies and tangents have derived from the title, this is the second scribe post during the second week of school in the semester..and omigosh I just realized it's the second day of the week too!! [Is this an omen? .....]

Hopefully this scribe post will be up to par with the first. I'm going to attempt and probably fail explaining the main idea of what we did in class today. I'm probably a bit rusty on the concept of relative velocity itself, and what I remember is in bits and pieces...literally. I'll try my best.

We started class today by grabbing textbooks and turned to page 95. Ms. K briefly flipped through the pages we were assigned to read last week and summarized each part.

We examined three cases of relative motion involving realistic situations, such as a person swimming to the shore but also being swept by a current.

**IMPORTANT DETAIL: Drawing the correct diagrams and knowing the direction of the vectors is one of the most important things to know when dealing with calculating relative velocity. Knowing how to draw the diagram and the position of the measurements of velocities and locations of the angles helps you correctly find the vectors in the end.

Another section was determining the time it takes to cross, for example, a finish line in a race, utilizing velocity = distance over time formula. Its use in this context is one of the only times that formula is required in the unit.

AIRPLANES
The main thing we had to know is what TAILWIND and HEADWIND are.

Tailwind is the wind current that travels in the direction that the plane is going, making it easier for the plane to fly forwards because it helps it along. This current is the protagonist...our friend.

Headwind is the current travelling in the opposite direction of the plane, giving the plane difficulties and slowing it down. This current is the evil enemy.

Afterwards we corrected the majority of the sheet given to us yesterday, questions 34 to 41, but then we didn't quite finish correcting those. Tomorrow the class will conclude correcting the last two questions and possibly 38 if there is time.

But for now, here are the answers to what we got today.

34.a)
34.b)

35. 101.5 km/h, 98.5 km/h

36a) -35 km/h
b) +35 km/h
c) +125 km/h
d) +125 kmh

37) 20 degrees [S of E]

38 omit for now. no time -no crime.

39) a = 33 km/h [S]

40 and 41 will be finished tomorrow

I'm sorry for the rushed scribe. I would've done a better job if I got home earlier today. It's so "half-banana'd". But there's always the edit function and I can redeem myself. But I really need to get this other hw done. But for now, the next scribe is........... NICOLIASSSSSSSSSS!!!

First Scribe Post YAY!

Well it's a new semester, a new physics class, and a new BLOG! Its only been a week of classes and yet it feels like I've been learning these subjects since forever. Do you guys have that feeling? Well I hope so, its such a nice bubbly feeling inside! (Heh...)

Anyhoo, lets get to what happened today:

1) We handed in a worksheet. I believe it was the one the sub on Friday gave us with 7 questions on it. If you did not hand it in, I would suggest handing it in ASAP. It is for marks you know. If you weren't here today, I'm sure Ms. K will let you hand it in tomorrow without any deductions, because she's cool like that.... right?

2) Ms. K gave us the answers to the worksheets we were given on the 4th. If you didn't get the right answer, I would suggest trying it again and figuring it out yourself. If that fails you can always ask the someone who sits beside you or around you. As a last resort, consult with Ms. K. Alrighty? Well here are the answers:

Acceleration Worksheet (One with the falling rock as the first question):

1. 4.6 s

2. 2.8 m/s

3. 6.93 s

4. .591 m/s

5. 78 m

6. 21.4 m/s

7. 24 m/s

8. a) 2.9 s b) 28 m/s

9. a) 693 m b) 252 m/s

10. 1700 m



Acceleration (Donovan Bailey)



1. Donovan Bailey: 10.2 m/s, Michael Johnson: 10.4 m/s, 9.2 m/s

2. 4.2 m

3. 100 m

4. 5.5 m/s

5. 1.52 s

6. 9.3 m/s

7. 3.8 m, 17 m/s

8. a) 4.8 m b) 120 m c) 390 m d) 950 m

9. 15 m

10. 1350 m

11. a) 15 s b) 42.7 m c) 55 m/s



If you copied down different answers or I made a typo please tell me. I shall fix it as soon as I can so everyone can have the same answers!



3) We also went over the Relative Motion Worksheet. (Given to us on Friday). It actually seems pretty simple. Here are the answers:



Case 1: 135 km/h [E] OR +135 km/h

Case 2: a) 250 km/h [W] b) 250 km/h [E]

Case 3: a) 10 km/h [W] b) 10 km/h [E] c) 70 km/h [W]



As we were going over this we learned how to find relative motion in 2D. Remember how to add vectors and trigonometry via grade 11 physics? Well it's exactly like that. Here's a wonderful picture trying to explain it:





What is relative motion you might ask? I found a few sites that might help you if you're having trouble understand what it is. Please click here, here, and here. (I recommend the third one =D)


For homework there was a worksheet that Ms. K handed out about relative motion. Do questons 34-42. Well at least I THINK it's for homework. =)


Well that's all I think. If I missed anything, leave a comment k ;)


OH YEAH! We have a test on Thursday about this stuff. Study hard mon amis.


The next scribe is Jamie .

Derivation of Acceleration Formulae

Derivations

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Scribe List

This is The Scribe List. Every possible scribe in our class is listed here. This list will be updated every day. If you see someone's name crossed off on this list then you CANNOT choose them as the scribe for the next class.


This post can be quickly accessed from the [Links] list over there on the right hand sidebar. Check here before you choose a scribe for tomorrow's class when it is your turn to do so.

Tan LM abbas

renster

MOOffatt D-S Skyline jeck