Maths Ext 2 Predictions (1 Viewer)

[femboys4life]

are mech questions on resistance proportional to square of velocity in syllabus? ik its mathematically wrong to separate squares into x and y components but wondering if hsc could ask?

 

[Armon]

I'm gonna offer an alternative angle - given the syllabus revision coming up in 2026 - NESA is realising the lack of clarity in the original syllabus and will play by the books this year and until the new syllabus is released - meaning they will stick to tried and true questions, or am I coping hard?

Dude, syllabus is merely a suggestion, see Q14a 2022 3u exam for proof

 

[Armon]

are mech questions on resistance proportional to square of velocity in syllabus? ik its mathematically wrong to separate squares into x and y components but wondering if hsc could ask?

Yeah they're in syllabus, but you will not be asked to derive the equations because thats bad exam design; since it's so much bash, it would have to be worth a fair few marks and it would be later on in the paper. No way NESA would give 6 q15 marks to rote. Theres a reason they were removed in the latest syllabus revision.

 

[buckminsterfullerene]

Yeah they're in syllabus, but you will not be asked to derive the equations because thats bad exam design; since it's so much bash, it would have to be worth a fair few marks and it would be later on in the paper. No way NESA would give 6 q15 marks to rote. Theres a reason they were removed in the latest syllabus revision.

but eg a q like "given the velocity of impact, find the time of impact" would be in syllabus? as youd have to wrangle with partial fractions, and conceptual understanding about resetting bounds etc all the while not making algebraic errors with usually very ugly numbers and roots

 

[Armon]

but eg a q like "given the velocity of impact, find the time of impact" would be in syllabus? as youd have to wrangle with partial fractions, and conceptual understanding about resetting bounds etc all the while not making algebraic errors with usually very ugly numbers and roots

The topic is in syllabus and can be assessed. All I'm telling you is they are unlikely to make you derive the x and y values here.

 

[potpal]

hi sorry for the dumb question but if my raw marks for 21,22,23 papers in order are 78,54,72 (don't know what happened with 22 ), then realistically can I get an aligned exam mark that's an e4 this year?

 

[Armon]

hi sorry for the dumb question but if my raw marks for 21,22,23 papers in order are 78,54,72 (don't know what happened with 22 ), then realistically can I get an aligned exam mark that's an e4 this year?

yeah you only needed 61 raw for e4 in 22 and 23. my stats were similar in the leadup

 

[potpal]

yeah you only needed 61 raw for e4 in 22 and 23

but in 22 I got 54 which I think is an e3, so I'm not sure..

 

[Armon]

but in 22 I got 54 which I think is an e3, so I'm not sure..

Just don't get that on the HSC. Hope this helps.

 

[buckminsterfullerene]

what raw do you need for 95+?

 

[Armon]

what raw do you need for 95+?

80ish +- a few marks?

 

[kendricklamarlover101]

The topic is in syllabus and can be assessed. All I'm telling you is they are unlikely to make you derive the x and y values here.
View attachment 45002

those equations will most likely not be examined as they are not accurate to "square" resistance

 

[epicmaths]

Yes square of velocity as resistance should only apply for motion in 1 dimension. For projectiles its explicitly ruled out in the 2026 update as certain current textbooks that try to treat it actually do it wrong. I believe the HSC writers know better than put a quadratic drag projectile into the exam.

 

[epicmaths]

are you going to be streaming your reaction to the test again this year?

Yes I will hang around at work on Monday and try to get a copy of the paper and aim for a 6pm start - might go for a more clickbait title this year.

I'll be upfront I have not officially taught a cohort with this new syllabus, so my working out for the vectors and newer projectile stuff might be a bit scuffed, but yes a blind non-backseated playthrough in exam conditions upcoming!

 

[Trebla]

Fizzysoda emailed a few years back to clarify. Planes, Octets, Cross Product are all OOS.

That just means that you are not required to recall conceptual content specific to planes. However, it doesn't mean that it is ruled out from the "application" side of the syllabus.

It is possible for an exam question to guide you into doing a vectors question on planes by derivation. For example, given vectors parallel and perpendicular to the plane, they may ask you to derive the Cartesian equation of a plane. Technically, you are just using tools you already know within the syllabus (i.e. the dot product) and just applying it to an unseen problem. However, they cannot ask you to quote the equation of a plane upfront, because that is not explicitly in the syllabus.

Another example is repeated factors in partial fractions. Technically, it is not in syllabus but that never stopped it occasionally appearing in the HSC exams. This is because the exam question must tell you the structure of the partial fractions for repeated factors and you need to be guided into deriving it by using tools that are within syllabus. However, you are not expected to recall the structure of partial fractions when there are repeated factors, because that is outside the syllabus.

 

[Dontcallmedude]

If there is a resisted projectile motion question I am screwed. I get generally around 74-81 on 2024 school past papers and have yet to see a resisted projectile motion question. If there is one I'm going to be so surprised you will know it's me if you see me in the exam hall. My jaw will be effected by gravity and 1000000v^10000000

 

[Dontcallmedude]

Even eddy woo has the wrong method on YouTube I believe.

 

[OD6]

What do you guys think will be the focusses in the later/ more difficult parts of q14/15? Most of the time I struggle to complete most of q16 (though I am able to get some marks from a few questions often without solving them). I just got a 60 raw mark on the 2022 hsc paper, and would like to bump that up a little and give myself a shot at an e4, and I think those harder questions in the middle of the paper will likely be how that is determined.

Also, with that kind of mark, how likely is it that I can get an e4? I'm just hoping there aren't too many weird vectors/mechanics questions

 

[K1uggie]

What do you guys think will be the focusses in the later/ more difficult parts of q14/15? Most of the time I struggle to complete most of q16 (though I am able to get some marks from a few questions often without solving them). I just got a 60 raw mark on the 2022 hsc paper, and would like to bump that up a little and give myself a shot at an e4, and I think those harder questions in the middle of the paper will likely be how that is determined.

Also, with that kind of mark, how likely is it that I can get an e4? I'm just hoping there aren't too many weird vectors/mechanics questions

Thats almost a B6:

Year	Raw Mark (/100)	Aligned Mark (/100)	Band

2022	84	96	E4
2022	76	94	E4
2022	67	91	E4
2022	65	91	E4
2022	51	80	E3
2022	50	79	E3

 

[user1207]

is implicit differentiation oos