Carrotsticks' Extension 1 HSC 2013 Solutions (2 Viewers)

[Carrotsticks]

Here is the link to my solutions. This is essentially a first draft so please let me know if I made a typo!

https://www.dropbox.com/s/tkwu7kj4rdrw2vp/HSC 2013 Extension 1 Solutions.pdf?dl=0

The result in the final final question can be confirmed via a graphing program. Really cool stuff!

 

[Carrotsticks]

Note, it'll take a bit longer than usual because I'm on my laptop, not on the desktop at home, so please bear with me =)

 

[bangladesh]

fauuuuuur good guy carrotsticks.

 

[AnimeX]

Note, it'll take a bit longer than usual because I'm on my laptop, not on the desktop at home, so please bear with me =)

Thanks Carrot!!

 

[Lanxal]

Time to rock and roll. Our gratitudes, carroty! =D

 

[Carrotsticks]

Nearly done with Q14! On the very last part now. After that, checking solutions.

 

[lijincheng]

For that simple harmonic motion question, rather than proving by a=n^2x, i integrated it and expressed it in the form of Asin(nt+w) would i still get the mark? :L

 

[kimjuliana]

I rearranged it to the form v^2= n^2[(a^2-(x-c)^2], where a is amplitude and c is centre of motion... Not sure if this makes it SHM though...

 

[Recondit]

Carrotsticks = legend

 

[Carrotsticks]

Finished! Uploading now.

 

[Carrotsticks]

Solutions are up!

 

[Carrotsticks]

Checking through my solutions, I see I made a small error on the parametrics. Quickly fixing that up now =)

 

[Carrotsticks]

Done =)

 

[lijincheng]

Q 12 c is to the nearest minute

 

[andybandy]

for 13b)ii) i knew what to do but i wasn't getting the equation out right! ahhh!

 

[Carrotsticks]

Q 12 c is to the nearest minute

Cheers!

13bii) is wrong. last 2 lines

Just fixed that a couple minutes ago =)

 

[Locus]

14biii) Would you lose any marks if you didn't show n=1,2,3 ... but did all the other steps, if so how many?

 

[Makematics]

fml sillies again

 

[SpiralFlex]

^ Which is why a good night of sleep can make all the difference.

 

[AnimeX]

I rearranged it to the form v^2= n^2[(a^2-(x-c)^2], where a is amplitude and c is centre of motion... Not sure if this makes it SHM though...

I did this aswell, is it alright?