Physics Predictions/Thoughts (4 Viewers)

[Jonathan Wayne]

Rather the opposite I liked the 2023 exam. I was just so worried about the larger writing responses I overlooked simple calculations like this

 

[Tryingtodowell]

low band 5

what do you think the e4 alignment for us is?
Last year it was 80 for an e4 aligned

 

[coolcat6778]

what do you think the e4 alignment for us is?
Last year it was 80 for an e4 aligned

around 80 - high 70s or low 80s.

definitely not in the low 70s, as NESA probably deems the history questions trivial (likely due to high mark average) so ur fucked if u didn't answer them at all

 

[Tryingtodowell]

around 80 - high 70s or low 80s

bro
people on conquer were saying it was mid-high 80s. around 85-86

 

[svad]

i thought it was very easy

Yeah it was ngl, a lot of writing though. Wasn’t too hard, just annoying that they had many back to back question of writing

 

[coolcat6778]

Yeah it was ngl, a lot of writing though. Wasn’t too hard, just annoying that they had many back to back question of writing

this felt more like a humanities exam than a physics exam

 

[coolcat6778]

There are literally NO intellectually demanding calculation questions. What separates a band 6 student from a band 5 physics student is not their quantitative ability and critical thinking, but rather their ability to write "beautifully". This is especially true for the ~20 marks worth of history reciting questions

Lol I literally predicted the 2025 exam structure 1:1

I was initially exaggerating as 2024 only had like 14 marks.

 

[Trial&Error]

Predictions time I guess:

- Escape velocity calculation (3marks)
-Explain why Gravitational Potential Energy is negative?? idk maybe that's too "hard" (3marks)
-Observations and experiments using light have provided us with substantial information on other physics concepts which are not light. Analyse this statement (9marks)
-Photoelectric effect calculate stopping voltage (3marks)
-Analyse the energy changes of projectile motion and account for these changes (4marks)
-Analyse the limitations of the classical BB radiation curve and how Planck overcame them, include a graph (6marks)
-something about the conservation of energy in emission/absorption spectra (4marks)
-calculate the speed of light given experimental data of foucault/fizeu's experiment (4marks)
-something about the efficiency of transformers OR motors (5 marks)
-very, very basic dc motor calculation (3marks)

I think I should become a nesa exam writer lol.

I was somewhat correct actually lol

 

[BionicMango]

@tywebb
View attachment 50536
I'm sorry, there was no need to v^2 = u^2 + 2as

Doesn't that imply the motion is not uniformly circular? Like it's circular but at a constant speed, which means that the basic formula you used to calculate it (mv^2/r) doesn't apply

 

[coolcat6778]

Doesn't that imply the motion is not uniformly circular? Like it's circular but at a constant speed, which means that the basic formula you used to calculate it (mv^2/r) doesn't apply

actually I think it's just a coincidence, their equation simplified to look exactly like v^2 = u^2 + 2as.

 

[BionicMango]

actually I think it's just a coincidence, their equation simplified to look exactly like v^2 = u^2 + 2as.

No I meant the sqrt3 bit

 

[BionicMango]

Like shouldn't the speed stay the same for it to be uniform circular motion, otherwsie you can't use mv^2/r

 

[ros545]

How much of Year 12 Physics is actually carried on into university?

 

[coolcat6778]

Like shouldn't the speed stay the same for it to be uniform circular motion, otherwsie you can't use mv^2/r

we only calculate the speed at the maximum height
At maximum height net -F = -mg + N = -mv^2/r ==> v = root(rg)
N = 0 as it's maximum

Then we use conservation of mechanical energy (in which the path taken doesn't matter as long as no energy is lost)
to find the velocity at A

 

[coolcat6778]

How much of Year 12 Physics is actually carried on into university?

sack mod 7 and 8. Most of prelim and mod 5 and 6 do though

 

[BionicMango]

How much of Year 12 Physics is actually carried on into university?

As far as I know all of it but actually backed up with maths. So it feels more like year 11 but there will be mod 5, 6, 7 and 8 content just with calculus and everything (depending on what major you do). Least of all mod 7 though.

Like if you do astrophysics then for sure mod 7/8 will apply at some point. But with the maths.

 

[Trial&Error]

Which year do you guys think this exam will align/scale most like? I hope its not like 2022 cause I made so many dumb mc mistakes due to not having enough time. (I did mc at the end btw worst decision of my life)

 

[BionicMango]

we only calculate the speed at the maximum height
At maximum height net -F = -mg + N = -mv^2/r ==> v = root(rg)
N = 0 as it's maximum

Then we use conservation of mechanical energy (in which the path taken doesn't matter as long as no energy is lost)
to find the velocity at A

Riiight yeah, only at max height is the tension force zero and mv^2/r = mg. At other places it's not necessarily uniform circular motion anyway, which doesn't matter.

 

[BionicMango]

Which year do you guys think this exam will align/scale most like? I hope its not like 2022 cause I made so many dumb mc mistakes due to not having enough time. (I did mc at the end btw worst decision of my life)

I disagree with coolcat in that it will not scale like 2022, 2025 was no where near as easy and did not test many of the dot points in a difficult way (aside from a few).

 

[Trial&Error]

I disagree with coolcat in that it will not scale like 2022, 2025 was no where near as easy and did not test many of the dot points in a difficult way (aside from a few).

So do you think it will or won’t scale like 2022? I’m sorry I don’t exactly get what you‘re saying.