Unit 3 Physics exam feedback
By Heath McGregor on Jun 9, 2009 in VCE Exams, VCE Physics
Hi all,
By now, you should have finished the Unit 3 Physics exam for 2009.
What did you think of the paper? What was hard? What was easy? How do you think you went?
Let me know your thoughts and comments below (please keep them clean!)…cheers
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Sara | Jun 9, 2009 | Reply
Wasn’t as easy as I thought it would be…hmmm. So relieved to have finished it thou! Yay!
Alex | Jun 9, 2009 | Reply
I found it easier than the past VCAA papers.
Here are some of the answers that I got that I can remember (of which I think a few are wrong!):
-Kid jumping on trolley question: v=2.67m/s
-Spring and energy question: k=200N/m
-Projectile motion question: 45m above cliff edge and 105m (I think!) from the cliff edge to the ground
-Thermistor and variable resistor question: variable resistor should be increased
-Carrier wave in the microphone, amplifier and optic fibre system: B (information wave), A (carrier wave), C (amplitude modulated carrier wave), B (information wave)
-Soft vs hard steel: hard steel was stiffer and soft steel was tougher
-New length of piece of hard steel: 20.01 (because it was subjected to a tensile stress, I added the change in length to the original length, I hope that’s correct!)
-Arch question: strong when subjected to compressive stress
If people posted the answers they remember it would be great to give everyone a rough idea on how they went
I would really appreciate it anyway!
I’ll post more as soon as I remember them
Cheers!
Guiseppi | Jun 9, 2009 | Reply
I thought the exam was relatively easy. apart from a few stupid errors i made, i feel the paper was fairly tame.
sorry to be the one to tell you Alex, but the spring constant was 500N/m and the projectile motion question the h=135m. but you got the 45m part right.
The itute website should have the multi-choice sections answers up probably by tomorrow night or tonight.
so relieved tho
j | Jun 9, 2009 | Reply
are you sure the carrier wave was A? i thought it was the other way around?
and with the question relating to the apparent weight when in the lift thing what was the solution to that?
Robin Hu | Jun 9, 2009 | Reply
Hey,
yeah i thought it was generally easier than i expected…
probably easier than it shouldve been
i think quite a few people even in my yr level at school would’ve gotten full marks, which is kinda worrying
like the cutoff for A+ is gonna be like 97% or something >_>
Rach | Jun 9, 2009 | Reply
i didnt enjoy it i made stupid mistakes everywere
Milano | Jun 10, 2009 | Reply
I didnt find it too difficult.
was anyone else stupid like me and didnt know there were questions about thermistors in the electricity section?
i stupidly assumed that after the ‘this age is blank’ page that it was the end of the section and didnt know there were more electricity questions.
killing myself!!!
Glenn | Jun 10, 2009 | Reply
Hmm I suspected that the variable resistor should be decreased. Not sure if this is how the question was worded… But it said something along the lines of to decrease the temperature for the system to turn on should the variable resistor be increased or decreased? but if the variable resistor was increased, that implies more voltage drop across it, and less voltage drop across the thermistor meaning less resistance across it which gives a “higher” temperature across it. And we require a “smaller” temperature hence require more resistance on it.
Spluff | Jun 10, 2009 | Reply
It was very easy. I wish it were harder, because this means that a calculation error or two could drop you down a long way.
joe | Jun 10, 2009 | Reply
Does anybody know if the Physics exam answers have been released? If so, where can i find them?
katie | Jun 10, 2009 | Reply
i think it was too easy. a few questions i really screwed up. my voltage divider question didnt even add up to 10V it was like 9.8, so yer not sure which part i screwed up there. made a massive mistake with the vertical motion question. damn it. im worried that because it was too easy ill get a crap mark because i screwed up a couple. shouldve been harder, i rekon i could do harder.
this page is blank =='' | Jun 10, 2009 | Reply
@Milano: OMGG!!! I thought i was the only one who thought that the ‘this page is blank’ indicated that there were no more questions after that. ==’ i’m so depressed because of that. ARGH! why do they have to have such things anyway!!?! they could’ve just wrote ‘continued next page’ or something.
jyu | Jun 11, 2009 | Reply
easy exam
http://www.itute.com/download-free-vce-physics-resources/free-physics-trial-exams-and-vcaa-physics-exam-solutions/
Coral | Jul 4, 2009 | Reply
My friend’s calculator died early during the exam. Staff found her another one (this took 20 minutes) but it wasn’t suitable and now she is worried she will fail the subject. Can anything be done? It seems so unfair, she has worked so hard. Coral.