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Author Topic: A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION  (Read 4008 times)

Offline joel

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A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION
« on: May 20, 2011, 07:15:21 am »
Could anyone do the October/November 2002, Paper 5, Question 2.

Link to question paper -

http://www.xtremepapers.me/CIE/index.php?dir=International%20A%20And%20AS%20Level/9702%20-%20Physics/&file=9702_w02_qp_5.pdf


Thanks!
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Offline joel

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Re: A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION
« Reply #1 on: May 20, 2011, 07:28:54 am »
All the design questions from May/June 2002 to October/November 2006 are really tricky.
So I you guys don't mind, can you upload your answers if you have done those questions.
I am also attaching a pdf document containing all the design questions from June 2002 to November 2006.

Please reply soon!
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Offline aldehyde1612

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Re: A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION
« Reply #2 on: May 20, 2011, 03:19:29 pm »
Just a heads up... people may take a while to reply.. because if theyre like me- they havent done the papers before 2006.  :-\

But I'll have a go anyways :D. In simple.. for the experiment I'd probably have a signal generator attached to a vibrator connected to the string. The string would be in a pulley system with a known wieght attached to the end (can find tension from that). For different masses (tensions), vary the vibrations until a max amplitude is seen.. the frequency that it occurs at is the resonant frequency. Record the resonant frequency and tension.. construct a graph- tension on x-axis and frequency on y-axis. right? And the controls- same mass per unit length of wire.. same length of wire (basically same wired used) for each tension... but the thing im stuck on is -would you have to change the lengths to keep it at the fundamental mode for each tension?? TBH- i cant remember what the fundamental node is.  :P and safety - i dont know?- maybe ear protection incase of high pitch frequencies?

hope i helped in some way. sorry if its vague.. its just off the top of my head.
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Offline leebux101

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Re: A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION
« Reply #3 on: May 21, 2011, 02:45:46 pm »
how can u find the tension from the weights?
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Offline aldehyde1612

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Re: A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION
« Reply #4 on: May 21, 2011, 03:07:58 pm »
Quote from: leebux101 on May 21, 2011, 02:45:46 pm
how can u find the tension from the weights?

dont know.. google it.  :P

Im pretty sure its got something to do with the weight. ?
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Offline leebux101

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Re: A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION
« Reply #5 on: May 21, 2011, 03:13:45 pm »
cant we just turn the pegs of a guitar and attach a newton meter to it?
secondly can someone PLEASE explain ON09 P51 q1 and with a diagram if possible please! =(
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Offline aldehyde1612

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Re: A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION
« Reply #6 on: May 21, 2011, 03:33:38 pm »
Quote from: leebux101 on May 21, 2011, 03:13:45 pm
cant we just turn the pegs of a guitar and attach a newton meter to it?
secondly can someone PLEASE explain ON09 P51 q1 and with a diagram if possible please! =(


that actually seems smarter :P .. how do you find the frequency tho?

And what exactly do you need help in that?.. its easier that way. instead of writing up the whole thing- cause you could just look at the marking scheme?

I attached a paint version of the diagram I drew which my teacher said was okay.
« Last Edit: May 21, 2011, 03:46:14 pm by aldehyde1612 »
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Offline leebux101

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Re: A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION
« Reply #7 on: May 21, 2011, 03:36:01 pm »
Quote from: aldehyde1612 on May 20, 2011, 03:19:29 pm
Just a heads up... people may take a while to reply.. because if theyre like me- they havent done the papers before 2006.  :-\

But I'll have a go anyways :D. In simple.. for the experiment I'd probably have a signal generator attached to a vibrator connected to the string. The string would be in a pulley system with a known wieght attached to the end (can find tension from that). For different masses (tensions), vary the vibrations until a max amplitude is seen.. the frequency that it occurs at is the resonant frequency. Record the resonant frequency and tension.. construct a graph- tension on x-axis and frequency on y-axis. right? And the controls- same mass per unit length of wire.. same length of wire (basically same wired used) for each tension... but the thing im stuck on is -would you have to change the lengths to keep it at the fundamental mode for each tension?? TBH- i cant remember what the fundamental node is.  :P and safety - i dont know?- maybe ear protection incase of high pitch frequencies?

hope i helped in some way. sorry if its vague.. its just off the top of my head.
how would u measure the resonant frequency?
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Offline leebux101

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Re: A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION
« Reply #8 on: May 21, 2011, 03:38:19 pm »
Quote from: aldehyde1612 on May 21, 2011, 03:33:38 pm
that actually seems smarter :P .. how do you find the frequency tho?

And what exactly do you need help in that?.. its easier that way. instead of writing up the whole thing- cause you could just look at the marking scheme?
actuallyy i wouldnt apply the guitar method cuz turning the pegs would vary the length of the wire. ur way is better, but i dont underatnd how u wud calculate the frequency? secondly i dont understand the marking scheme for ON09 , so if u cud gimme a diagram, it'll be very helpful. =)
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Offline aldehyde1612

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Re: A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION
« Reply #9 on: May 21, 2011, 03:51:27 pm »
The signal generator thing would give you the frequency? .. or.. you attach that to a CRO with a known timebase scale- and read off that?

I edited my previous post with a shifty diagram. lol. its easier than getting my scanner out.  :D
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Offline leebux101

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Re: A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION
« Reply #10 on: May 21, 2011, 04:07:38 pm »
yeah i guess u cud read off the frequency that gave off max amplitude oscillation from the signal generator. and thanks for the diagram! ur a life saver! =D
one more thing, what is ur dependent and indepenedent variable in the ON09 question?
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Offline aldehyde1612

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Re: A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION
« Reply #11 on: May 21, 2011, 04:11:38 pm »
I took resonant frequency as dependent.. and volume as independent.
so f2 on y-axis and 1/V on x-axis.
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Offline leebux101

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Re: A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION
« Reply #12 on: May 21, 2011, 04:13:32 pm »
thankyouu soooooo effing much! =D =D =D
+rep =D =D
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Offline TJ-56

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Re: A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION
« Reply #13 on: May 22, 2011, 10:44:45 am »
May June 2010 Paper 5, question 1, what should we draw exactly for the diagram?
Can someone help with this and post their drawing if possible?
Really appreciate the help.
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Offline aldehyde1612

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Re: A2 CIE PHYSICS (9702) - PAPER 5 - DESIGN QUESTION
« Reply #14 on: May 22, 2011, 11:40:50 am »
51 or 52?
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