Maths Extension 2 Predictions/Thoughts (1 Viewer)

[ISbos]

Q15 SMH i don’t think the intended method was v^2 = n^2..etc, correct me if i’m wrong but the intuitive method is to just let x = Acos(4pi t) solve for t at x =1/4 (t = 1/4pi arcos(1/4A)), then diff for v, set it to half Vmax so u just have -1/2 = sin(arccos(1/4A)) draw up a triangle to get -1/2 = sqrt (16A^2 - 1)/4A, solve for A, then sub it in and derive for acceleration, then the coefficient is just max acceleration.

 

[coolcat6778]

Q15 SMH i don’t think the intended method was v^2 = n^2..etc, correct me if i’m wrong but the intuitive method is to just let x = Acos(4pi t) solve for t at x =1/4 (t = 1/4pi arcos(1/4A)), then diff for v, set it to half Vmax so u just have -1/2 = sin(arccos(1/4A)) draw up a triangle to get -1/2 = sqrt (16A^2 - 1)/4A, solve for A, then sub it in and derive for acceleration, then the coefficient is just max acceleration.

nah they fully expected most to just use v^2 = n^2(A^2-x^2), infact one of the mcq questions required the knowledge of this formula (completing the square and finding amplitude). Problem is most people weren't expecting them to use a = -n^2x or something idk

 

[gonnaflynow]

What raw mark do you reckon you'd need to get an 80 aligned?

 

[ISbos]

nah they fully expected most to just use v^2 = n^2(A^2-x^2), infact one of the mcq questions required the knowledge of this formula (completing the square and finding amplitude). Problem is most people weren't expecting them to use a = -n^2x or something idk

yeh i forgot ab that q icl. i swear ur not allowed to assume that v^2 formula tho so its pretty slack if that was the intended method

 

[barnyard]

start censoring 67 with the spoilers istg

no it's awesome please keep the six sevens going

 

[barnyard]

fwiw, i think multis were harder than previous years, and the rest of the paper was pretty easy. obviously, there were parts where i struggled due to exam stress, you cant expect perfection with all the pressure, but i think it was one of the easier ones and im not sure why ive seen people saying it was harder than 2022

 

[TheOneTrueStudent]

What raw mark do you reckon you'd need to get an 80 aligned?

It'd def be smth low like really low anywhere from a high 50 to 60s depending on how hard the test was for everyone

 

[TheOneTrueStudent]

fwiw, i think multis were harder than previous years, and the rest of the paper was pretty easy. obviously, there were parts where i struggled due to exam stress, you cant expect perfection with all the pressure, but i think it was one of the easier ones and im not sure why ive seen people saying it was harder than 2022

maybe on par I'd say

 

[coolcat6778]

nah the mcq was actually quite easy. the velocity vs displacement question was just testing how well u know graphs, 10 was just process of elimination getting rid of the obviously wrong options

 

[barnyard]

nah the mcq was actually quite easy. the velocity vs displacement question was just testing how well u know graphs

10 was fine but god did i take my time with 6 and 9

 

[TheOneTrueStudent]

Do you guys think it’s worth doing Maths Extension 2 or should I just stick with Extension 1 and Advanced because of how much study time it takes

An E2 in ext2 scales higher than a B6 in adv and if you lock in you can get anywhere from a E3-4 which is worth more

 

[coolcat6778]

An E2 in ext2 scales higher than a B6 in adv and if you lock in you can get anywhere from a E3-4 which is worth more

Low E3*, 40/100 raw

 

[TheOneTrueStudent]

what do you reckon 60 raw would get you as an atar contribution?

 

[coolcat6778]

what do you reckon 60 raw would get you as an atar contribution?

pink line: extension 2
blue line: math advanced
light blue line: english adv, std, studies

ur hsc mark would be in the high 80s, which is equivalent to 98 atar probably

 

[coolcat6778]

guys if u scored atleast 40/100 raw, ur scaled mark is quite literally equivalent to atleast an 87 hsc mark in physics

 

[TheOneTrueStudent]

guys if u scored atleast 40/100 raw, ur scaled mark is quite literally equivalent to an 87 hsc mark in physics

physics is annoying

 

[coolcat6778]

physics is annoying

hsc physics*

 

[AAArated]

lmao they stealing questions from STEP cambridge papers now. Overall not a bad paper except Q16 difficulty was high.

 

[AAArated]

maybe on par I'd say

definitely not harder than 2022 maybe more difficult than 2023 due to Q16

 

[tywebb]

it helps to get alternative solutions, especially for ext. 2.

so where would alternative solutions likely be coming later?

not all these rush to get solutions out quickly

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