Login

Search the forums now!

Welcome, Guest. Please login or register.

October 24, 2025, 02:53:47 am
Pages: 1 [2] 3   Go Down

Author Topic: EXAM2 THOUGHTS +ANSWERS  (Read 10146 times)  Share 

0 Members and 1 Guest are viewing this topic.

Jasper

  • Victorian
  • Adventurer
  • *
  • Posts: 24
  • Respect: 0
Re: EXAM2 THOUGHTS +ANSWERS
« Reply #15 on: November 17, 2007, 12:50:15 am »
0
Quote from: "joechan521"
e) A=7.8 B=30.4


What was this question again?
Logged

Matt89

  • Victorian
  • Trendsetter
  • **
  • Posts: 179
  • Respect: +1
Re: EXAM2 THOUGHTS +ANSWERS
« Reply #16 on: November 17, 2007, 12:53:45 am »
0
Quote from: "Jasper"
Quote from: "joechan521"
e) A=7.8 B=30.4


What was this question again?


It was about the inclined plane with a pulley at the end. You needed to find A and B where A is the minimum angle for equilibrium and B was the maximum possible angle. Like many of the questions, i remember getting A=7.8 and B=30.4, but i have no idea how i did it...
Logged

Daniel15

  • is awesome
  • Victorian
  • Forum Leader
  • ****
  • Posts: 600
  • Maintainer of the ATAR Calculator
  • Respect: +28
Re: EXAM2 THOUGHTS +ANSWERS
« Reply #17 on: November 17, 2007, 01:55:40 am »
0
Quote from: "Matt89"
Quote from: "Jasper"
Quote from: "joechan521"
e) A=7.8 B=30.4


What was this question again?


It was about the inclined plane with a pulley at the end. You needed to find A and B where A is the minimum angle for equilibrium and B was the maximum possible angle. Like many of the questions, i remember getting A=7.8 and B=30.4, but i have no idea how i did it...

I screwed that one up so badly...
I just wrote junk for it, couldn't figure out how to do it
>_<
Logged
Estimate your ATAR (ENTER)! VCE ATAR Calculator

2005: Cisco CCNA Units 1+2
2006: Info Systems [39 → 36.93]
2007: Specialist [33 → 43.13], Methods [39 → 44.48], Physics [34 → 37.38], English [23 → 19.91], Chem [26]
ENTER: 84.95

2008-2011: Professional Software Development, Swinburne Uni.

Galelleo

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 405
  • Respect: 0
EXAM2 THOUGHTS +ANSWERS
« Reply #18 on: November 17, 2007, 03:12:39 am »
0
yeah that pulleys one was the main problem i had with the exam, the rest i pretty much handled, but teh asnwer for A and B i got made no sense lol ... i had no clue at all
Logged
Light a man a fire and he will be warm for the rest of the night.
Light a man ON fire and he will be warm for the rest of his life.

Ahmad

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1296
  • *dreamy sigh*
  • Respect: +15
EXAM2 THOUGHTS +ANSWERS
« Reply #19 on: November 17, 2007, 05:42:03 am »
0
To find lower and upper bounds for theta you had to consider two cases. If the frictional force is acting down the plane or up the plane. By solving some equation involving sin and cos you eventually get those answers.
Logged
Mandark: Please, oh please, set me up on a date with that golden-haired angel who graces our undeserving school with her infinite beauty!

The collage of ideas. The music of reason. The poetry of thought. The canvas of logic.

melodrama

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 226
  • Respect: +1
EXAM2 THOUGHTS +ANSWERS
« Reply #20 on: November 17, 2007, 05:56:23 am »
0
was that something you just plugged into your calc for? ARGH must have made a typing error then :(:(:(
Logged

English 45  Chemistry 45  Specialist 45  Physics 44  Chinese 40  Methods 44  ->  ENTER 99.75

Ahmad

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1296
  • *dreamy sigh*
  • Respect: +15
EXAM2 THOUGHTS +ANSWERS
« Reply #21 on: November 17, 2007, 06:02:28 am »
0
Yeah, but you could just plot the equation and find the x-intercept. Wouldn't be hard on any calculator...  8)
Logged
Mandark: Please, oh please, set me up on a date with that golden-haired angel who graces our undeserving school with her infinite beauty!

The collage of ideas. The music of reason. The poetry of thought. The canvas of logic.

bilgia

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 410
  • Respect: +1
EXAM2 THOUGHTS +ANSWERS
« Reply #22 on: November 17, 2007, 06:15:17 am »
0
yeah thats what i did..
Logged
My Subjects:
2006 I.T Systems --> 42
2007 English --> 40
         Methods --> 41
         Spec --> 38
         Chem --> 36
         Physics --> 37
         Unimaths --> 5.5

ENTER: 97.35


                   



 

joechan521

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 357
  • Respect: +1
EXAM2 THOUGHTS +ANSWERS
« Reply #23 on: November 17, 2007, 09:06:45 am »
0
how did u guys attempt the last question??
i graphed the fint(f(x),x,8,x) and the other function, and found intercept, but the fuking calculator, 84+ takes like 50-60secs to graph it, and i graphed about 3-4 times with wrong scale... everytime change the window, take that long to graph again.
and takes like 1 min to find intercept too...
is there any better way to attempt it?
Logged
06 method47 chinese 2nd language advanced39
07 english39 specailist44 accounting44 further48 psychology35
07 ENTER 99.15

Ahmad

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1296
  • *dreamy sigh*
  • Respect: +15
EXAM2 THOUGHTS +ANSWERS
« Reply #24 on: November 17, 2007, 09:29:59 am »
0
Use a CAS calculator and the solve function. Takes a few seconds.
Logged
Mandark: Please, oh please, set me up on a date with that golden-haired angel who graces our undeserving school with her infinite beauty!

The collage of ideas. The music of reason. The poetry of thought. The canvas of logic.

enwiabe

  • Putin
  • ATAR Notes Legend
  • *******
  • Posts: 4358
  • Respect: +529
EXAM2 THOUGHTS +ANSWERS
« Reply #25 on: November 17, 2007, 11:05:36 am »
0
We're complaining about that unfair advantage. :)
Logged

Matt89

  • Victorian
  • Trendsetter
  • **
  • Posts: 179
  • Respect: +1
EXAM2 THOUGHTS +ANSWERS
« Reply #26 on: November 17, 2007, 11:09:28 am »
0
Quote from: "Ahmad"
Use a CAS calculator and the solve function. Takes a few seconds.


Not all of us have a CAS calc unfortunately  :(
Logged

kido_1

  • Victorian
  • Forum Leader
  • ****
  • Posts: 526
  • Respect: +6
EXAM2 THOUGHTS +ANSWERS
« Reply #27 on: November 17, 2007, 11:47:52 am »
0
I wonder if I should buy a CAS calculator for spec next year, seeing that it gives an 'unfair advantage'?
Logged
oping for an ENTER of 99+

Matt89

  • Victorian
  • Trendsetter
  • **
  • Posts: 179
  • Respect: +1
EXAM2 THOUGHTS +ANSWERS
« Reply #28 on: November 17, 2007, 11:49:22 am »
0
Quote from: "kido_1"
I wonder if I should buy a CAS calculator for spec next year, seeing that it gives an 'unfair advantage'?


If you've got the cash, i would.

Would a CAS calculator be useful for uni courses too?
Logged

cara.mel

  • Guest
EXAM2 THOUGHTS +ANSWERS
« Reply #29 on: November 17, 2007, 12:04:24 pm »
0
Cas is nice :) As long as you learn how to do everything by hand, first. For methods last year (and in 1/2), my school put far too much emphasis on how to use the calculator, and as a result when I started preparing for exam 1, I realised just how much I couldn't do without it. I am still worse at exam 1s than exam 2s.

I found on the internet somewhere how to define a function on it to make it do implicit differentiation :D that was very useful except for the fact I didn't need it this year.

I've never used a non cas graphics calculator (well I've picked up my friends ones and complained that I can't use it and give it back after 30 seconds) so I don't have a great understanding of what we can do that normal ones can't. It is nice though, being able to differentiate/integrate everything so you know if you're right or not :)
Logged
Pages: 1 [2] 3   Go Up