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20-06-2014, 21:27   #121
Ompala
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I think that I just cried of happiness...
I'm glad, cos thats the first bit of good news coming from this thread all day!
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20-06-2014, 22:07   #122
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Any answers for 10, 8 or 6? :/
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20-06-2014, 22:27   #123
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Any answers for 10, 8 or 6? :/
For Q6
(a) (i) 320pi^2
(ii) 47.374
(b) (i) 8.81d
(ii) 14.2m

I messed Q8 up pretty bad and got some crazy answer for k
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20-06-2014, 22:31   #124
 
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I thought applied Maths was far easier than the mocks

But this could be one of those "oh it was such a nice paper" and then you do badly moments.
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20-06-2014, 22:33   #125
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Originally Posted by DoodleMe View Post
For Q6
(a) (i) 320pi^2
(ii) 47.374
(b) (i) 8.81d
(ii) 14.2m

I messed Q8 up pretty bad and got some crazy answer for k
Something similar for me, I think, on both counts of 6 and 8
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21-06-2014, 12:16   #126
mcratsix
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Yup, I think so. What did you get for k? I got 15
Ya I got 15. The periodic time was so simple, it was great
I couldn't get q10(b) ii, so I had 10 mins left at the end so I said I'd try and cram in q8, and it was prob like my best q other than q3

Last edited by mcratsix; 21-06-2014 at 12:20.
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21-06-2014, 12:47   #127
PhysicsKid99
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Ya I got 15. The periodic time was so simple, it was great
I couldn't get q10(b) ii, so I had 10 mins left at the end so I said I'd try and cram in q8, and it was prob like my best q other than q3
Excellent, another bit of good news, which seems limited these days... If I can ask, for Q4, what did you get?
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22-06-2014, 13:04   #128
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Excellent, another bit of good news, which seems limited these days... If I can ask, for Q4, what did you get?
For part A, I said that the acceleration of the free weight was twice the acceleration of the particle on the table, and the tension in the string connected to B was equal to the two tensions in the other strings added together. Can't actually remember what my answers were, I left them in surd from coz they weren't nice round numbers. Think the tension worked out around 270N though.
Part B: again, I forget my answer for part i, but I said it moved 66cm for part 2
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22-06-2014, 19:52   #129
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Re Q1 A i) I got 24-.5T^2 too but it now looks like I made a slip and the answer is 24-4.5t^2...

Distance = Sp - Sq + 24

S = UT + .5AT^2

Up and Uq = 15m/s
Ap = -4 m/s^2
Aq = -5 m/s^2

= 15T - 2T^2 - 15T - 2.5T^2 + 24

= 24 -4.5T^2

Got 18.375 for the second part.

Am I wrong?

Best of luck to everybody...
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22-06-2014, 20:04   #130
matthew8
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Originally Posted by KevStar View Post
Re Q1 A i) I got 24-.5T^2 too but it now looks like I made a slip and the answer is 24-4.5t^2...

Distance = Sp - Sq + 24

S = UT + .5AT^2

Up and Uq = 15m/s
Ap = -4 m/s^2
Aq = -5 m/s^2

= 15T - 2T^2 - 15T - 2.5T^2 + 24

= 24 -4.5T^2

Got 18.375 for the second part.

Am I wrong?

Best of luck to everybody...
There should be a double negative in there. Sp is 15t -2t*2 and Sq is 15-2.5t*2. Distance between is Sq-Sp+distance at start (24) which is 15t-2.5t*2-15t-(-2t*2)+24, which is 24-.5t*2.

While you're here, did your answer to 5 b make any sense (ie were the impulses the same) because no one I've seen here got it.
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22-06-2014, 20:13   #131
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Thanks Matthew I am just going to walk away from it my head is scrambled. I was clearer on the day. No, 5b was a mystery to me too...
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22-06-2014, 21:35   #132
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I appreciate most of you folk may have mentally signed off at this stage, but thought this was worth a shot.

I thought both this year's and last year's papers were particularly difficult and I am concerned about the effect this could have on the long term take-up of the subject if this pattern was to continue. I appreciate that A students will probably do fine on the paper and be able to handle most of the questions. But for those not in this category, I would be interested in how you (honestly) found the paper.
I have penned a bloppost on this at
thinkforyourself.ie

I would appreciate your thoughts either here or as a comment on the blog.

I will forward all relevant comments to the Applied Maths convener and the comments should get read out on the day that the examiners come together to put together their marking scheme.

Thanks in advance,
Noel
thephysicsteacher.ie
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22-06-2014, 21:41   #133
Ompala
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Originally Posted by hohum View Post
I appreciate most of you folk may have mentally signed off at this stage, but thought this was worth a shot.

I thought both this year's and last year's papers were particularly difficult and I am concerned about the effect this could have on the long term take-up of the subject if this pattern was to continue. I appreciate that A students will probably do fine on the paper and be able to handle most of the questions. But for those not in this category, I would be interested in how you (honestly) found the paper.
I have penned a bloppost on this at
thinkforyourself.ie

I would appreciate your thoughts either here or as a comment on the blog.

I will forward all relevant comments to the Applied Maths convener and the comments should get read out on the day that the examiners come together to put together their marking scheme.

Thanks in advance,
Noel
thephysicsteacher.ie
Can I ask what in particular you found particularly difficult about the two papers?
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22-06-2014, 22:11   #134
 
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Quote:
Originally Posted by hohum View Post
I appreciate most of you folk may have mentally signed off at this stage, but thought this was worth a shot.

I thought both this year's and last year's papers were particularly difficult and I am concerned about the effect this could have on the long term take-up of the subject if this pattern was to continue. I appreciate that A students will probably do fine on the paper and be able to handle most of the questions. But for those not in this category, I would be interested in how you (honestly) found the paper.
I have penned a bloppost on this at
thinkforyourself.ie

I would appreciate your thoughts either here or as a comment on the blog.

I will forward all relevant comments to the Applied Maths convener and the comments should get read out on the day that the examiners come together to put together their marking scheme.

Thanks in advance,
Noel
thephysicsteacher.ie
Firstly Noel thanks a million for setting up a great website. I thought this years paper was tough compared to others, I found 1b all of 3 to be fairly dirty compared to other years and 5b incredibly long and tedious
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22-06-2014, 22:15   #135
matthew8
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Now that's what I call a long time reader, first time poster.

I wouldn't say this years paper was particularly tough looking back. 2 and 10 were routine as they come. 3, 4 and 5 were hard for sections that are usually straight forward, and 1, while not routine, was very easy if you had any notion on power and an inclined plane.

On another note, isn't it a bit weird how, considering the marks are handed out in 5 marks supplements, an attempt mark (2) for a section will get you the exact same as everything right except for one blunder (5-3=2)?
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