**Applied Maths 2012 Before/After**

paddyhes

123Laura wrote: »

oh dear jesus I am far too tired to be doing maths, didn't cop it they'd started the derivation there have been trying to work out how on earth sin2x=2cos2x for a solid 20 minutes. Thanks

:L happens to the best of us :P
no problem

DoodleMe

paddyhes wrote: »

Yeah I'm going on to do mathsy/physicsy course in college hopefully.
Yeah it's alot easier than most subjects cause you just practice it (this is maths now).
Once you understand all the underlying principles and the physics behind the maths you're doing in applied maths its very easy to practice as well.
Yeah if you're good at maths and physics you should give it a go anyways :P
you'll always have your other 7 subjects to fall back on if it doesn't work out :P
Unless your school offers it as i subject :P :L

I think I'll give it a go then. It's most likely going to be one of my 7 subjects but I like the sound of it, I think I'll consider it more throughout the summer before I decide. Thanks for your input though and all the best for tomorrow

aarond280

paddyhes wrote: »

When i have to find the angle its deflected i usually just get the angle before, angle after, and then just draw a quick diagram to make sure i dont mess it up, and just add or subtract to get what i need :P

Yeah thats what I do :rolleyes: jus trying to finding alternate ways, great idea the night before the exam hahaha
What did you think of normal/ project math whatever you want to call it :P

paddyhes

DoodleMe wrote: »

I think I'll give it a go then. It's most likely going to be one of my 7 subjects but I like the sound of it, I think I'll consider it more throughout the summer before I decide. Thanks for your input though and all the best for tomorrow

Yeah hopefully it works out for you :P
No problem :P
Thanks

paddyhes

aarond280 wrote: »

Yeah thats what I do :rolleyes: jus trying to finding alternate ways, great idea the night before the exam hahaha
What did you think of normal/ project math whatever you want to call it :P

no let's not do that :L
hated project maths with a furious passion. *shakes fist*
think they tried to dumb it down and just messed it up for people who are good at pure maths :P
like the paper was extremely easy to get a B in and extremely difficult to get an A1 in which i didnt think was fair :P

RedTexan

123Laura wrote: »

oh dear jesus I am far too tired to be doing maths, didn't cop it they'd started the derivation there have been trying to work out how on earth sin2x=2cos2x for a solid 20 minutes. Thanks

You could just let it equal to one and use that to find the max instead of some crazy calculus!

aarond280

paddyhes wrote: »

no let's not do that :L
hated project maths with a furious passion. *shakes fist*
think they tried to dumb it down and just messed it up for people who are good at pure maths :P
like the paper was extremely easy to get a B in and extremely difficult to get an A1 in which i didnt think was fair :P

yeah i hated it soooooooooooooooooooooooooooooooooooo (emphises on the so :P) it was just stupid, they tried to sumb it down and give extra points for it ..... thats crazy saying that im not complaining :P
paper 1 was grand excempt some (c)(ii) i.e. 1(c)(ii) and 3(c(ii) other than that it was ok and the integration (c) oart was tough enough ah well done now :cool:

aarond280

RedTexan wrote: »

You could just let it equal to one and use that to find the max instead of some crazy calculus!

why would you let it = 1 ??

RedTexan

aarond280 wrote: »

why would you let it = 1 ??

When you get the range down in it's simplest form you end up with u^2 (sin(2alpha+beta)-sin(beta)) all over something like gcos(beta) or something, but anyway for that to be maximum sin(2alpha+beta) must equal to one, (from the unit circle) and then you do the inverse and all that and you come out with the correct answer. It's much easier than having to use calculus, our teacher never did calculus in question 3 with us!

treely

For the formula in SHM, what does the A stand for? Sometimes its amplitude, and other times its acceleration! Or am I just getting mixed up? Last minute WTF moment here!

RedTexan

treely wrote: »

For the formula in SHM, what does the A stand for? Sometimes its amplitude, and other times its acceleration! Or am I just getting mixed up? Last minute WTF moment here!

Capital A for amplitude, small a for acceleration

paddyhes

aarond280 wrote: »

yeah i hated it soooooooooooooooooooooooooooooooooooo (emphises on the so :P) it was just stupid, they tried to sumb it down and give extra points for it ..... thats crazy saying that im not complaining :P
paper 1 was grand excempt some (c)(ii) i.e. 1(c)(ii) and 3(c(ii) other than that it was ok and the integration (c) oart was tough enough ah well done now :cool:

yeah :L
Q1 c ii, messed up last part of question 6 and last part of the integration but i answered every question so hopefully still got the A1 :P
anyways good luck today :P

Pepperr

****ting bricks at the moment! Good luck to everyone today, and if Applied maths is your last subject, enjoy your freedom.

If like me you have technology or something after words, STAY STRONG!

Incompetent

Well feck that! Found connected particles (4) was ok. Apart from that the paper was a complete shambles for me. Pain in the arse. Hopefully I passed on attempt marks

BrianC2095

Same here Q10 was ....unusual i thought did anyone get the projectiles question out i completely flopped it:(

98q76e12hrflnk

Well **** that paper couldn't answer q10 at all or barely q5 FML:/

Incompetent

BrianC2095 wrote: »

Same here Q10 was ....unusual i thought did anyone get the projectiles question out i completely flopped it:(

I actually did ok in that one after looking back ( i think). Where'd you go wrong?

_Bella_

That was catastrophic to say the least! Thought it was a really tough paper, got a b3 in the mocks and was hoping to go up, but I'm definitely going to go down

BrianC2095

Incompetent wrote: »

I actually did ok in that one after looking back ( i think). Where'd you go wrong?

I do not have a clue i couldnt get two values for a i ended up with a tan quadratic that seemed unsolvable and then i couldnt get the angle a in the second part either but i think thats cuse my calcultor was set in radians :rolleyes:

BrianC2095

_Bella_ wrote: »

That was catastrophic to say the least! Thought it was a really tough paper, got a b3 in the mocks and was hoping to go up, but I'm definitely going to go down

Well the good thing is that if a lot of people found it tough the marking scheme might just be lenient and everyonell scrape through on attempts

123Laura

Anyone who thinks they got the answers please post them, you really don't know if your right or not with half of the answers as they're so random.

BEP!

That was awful.
What did people get for k on q10a? pretty sure i was miles off

BrianC2095

BEP! wrote: »

That was awful.
What did people get for k on q10a? pretty sure i was miles off

I got - 0.012 or something similar for k and then like 42 degrees after 15 mins

finality

BrianC2095 wrote: »

Same here Q10 was ....unusual i thought did anyone get the projectiles question out i completely flopped it:(

Didn't get the last part but I got the rest of it I think.

I loved q10 pretty sure I got it all right except I had the wrong sign in the b part for some reason. I did the last part by "or otherwise", first time I've ever been able to use an alternative method in a maths question. :L

Overall I messed up quite a lot, MIGHT have scraped a B but most likely a C (I think I got about 10/50 in q5 so that was what did the most damage). I thought it was quite a doable paper, I'm disappointed I didn't study for it more now.

Osric

Thought the paper was fair, although some parts really hard

Here are my answers:

(1)
(a) 44.1m
(b) 40 seconds
352m

(3)
(a) 36.87 and 53.13 (roughly)
4 seconds
(b) 60 degrees
70m/s

(4)
(a) 1.23m/s
1/11m
(b) (4mg(1+u))/5
(2g-f)/3

(5)
(a) proof
(b) proof

(9)
(a) s=7.79
(b) 1.2m
Theta = 60

(10)
(a) k = ln(1.5) / 600 (in seconds)
Temp = 41.77 degrees (roughly)
(b) proof
Proof

BL1993

BrianC2095 wrote: »

I got - 0.012 or something similar for k and then like 42 degrees after 15 mins

I got like 1/10ln(3/2)

Wanchor

That was terrible.

ECM2012

Osric wrote: »

Thought the paper was fair, although some parts really hard

Here are my answers:

(1)
(a) 44.1m
(b) 40 seconds
352m

(3)
(a) 36.87 and 53.13 (roughly)
4 seconds
(b) 60 degrees
70m/s

(4)
(a) 1.23m/s
1/11m
(b) (4mg(1+u))/5
(2g-f)/3

(5)
(a) proof
(b) proof

(9)
(a) s=7.79
(b) 1.2m
Theta = 60

(10)
(a) k = ln(1.5) / 600 (in seconds)
Temp = 44.17 degrees (roughly)
(b) proof
Proof

I got pretty much all those answers except for
10(a) I got k=(ln(4/3))/600

1(b)(ii) 218

Wesc.

Hope I got an A1... but I'm not 100% sure. Some of ye here got different answers to me for Q1 (b) so maybe I got that wrong, although my answers (38secs and 642.5m) seemed right at the time.

By the way, what did everyone get for Q2? Here are my answers:
(a) 71.46
(b) (ii) 13:21
(iii) 1.14 hours.

ECM2012

Wesc. wrote: »

Hope I got an A1... but I'm not 100% sure. Some of ye here got different answers to me for Q1 (b) so maybe I got that wrong, although my answers (38secs and 642.5m) seemed right at the time.

By the way, what did everyone get for Q2? Here are my answers:
(a) 71.46
(b) (ii) 13:21
(iii) 1.14 hours.

Pretty sure I got those aswers except I said 13.20 not 13:21 not sure why