HSC Extension 2 Mathematics Predictions / Thoughts (1 Viewer)

[Speed’o’sound Sonic]

Well guys, it was good fun but sadly the state rank has gone out the window. A few silly mistakes has brought what could have been 100 down to what looks like a 96, or 97 if they’re generous. She’ll be right, still a decent mark

 

[Speed’o’sound Sonic]

hey, it’s no worries, i’ll be happy to switch my 50 for ur 96/97

thanks, I’m sure you did fine as well

 

[Fabrizio]

How did you guys do the proof for the pully question with mass 4m and 2m? I had no clue where to get the 3

 

[Speed’o’sound Sonic]

Nah they were all correct on there.

 

[black.mamba]

total mass = 6m (of the system) which was the denominator, and there was a factor of 2 you could remove from both top and bottom

 

[Speed’o’sound Sonic]

How did you guys do the proof for the pully question with mass 4m and 2m? I had no clue where to get the 3

So the ‘3’ came from the net mass of 2 to the right divided by the total mass of 6’in the system

 

[black.mamba]

for 13 a though, n=6? right?

 

[jakurian]

So the ‘3’ came from the net mass of 2 to the right divided by the total mass of 6’in the system

would I get one mark if I had everything but the 3 in the denominator

 

[Speed’o’sound Sonic]

for 13 a though, n=6? right?

That’s what I thought! Fingers crossed!

 

[Speed’o’sound Sonic]

would I get one mark if I had everything but the 3 in the denominator

That would seem fair. If it was out of 2 you wouldn’t get a 0 for doing nearly all the working

 

[black.mamba]

also what was the amplitude, i had 2root3

 

[Fabrizio]

So the ‘3’ came from the net mass of 2 to the right divided by the total mass of 6’in the system

Big brain moment ffs. Looks like the only marks I have lost are from me being very dumb

 

[Speed’o’sound Sonic]

Big brain moment ffs. Looks like the only marks I have lost are from me being very dumb

All good mate from what it sounds like not many people seemed to understand that question

 

[hscisbotshit]

also what was the amplitude, i had 2root3

i got x=2root3cos(6t)+root3 im pretty sure

 

[Speed’o’sound Sonic]

i got x=2root3cos(6t)+root3 im pretty sure

That’s what I got too!

 

[Xanthi]

So the ‘3’ came from the net mass of 2 to the right divided by the total mass of 6’in the system

I equated to find tension in what was the longest bash ever for 2 marks.

 

[black.mamba]

i got x=2root3cos(6t)+root3 im pretty sure

yes yes please be right i need to see the paper to be sure but I'm begging that its right

 

[shashysha]

amplitude was 2root3 but i read the question wrong and thought it said max displacement from centre not centre of motion omg end me

 

[black.mamba]

amplitude was 2root3 but i read the question wrong and thought it said max displacement from centre not centre of motion omg end me

ahhh rip thats so unlucky

 

[Speed’o’sound Sonic]

amplitude was 2root3 but i read the question wrong and thought it said max displacement from centre not centre of motion omg end me

Yikes that is bad luck did anyone think do put a plus/minus before the cosine function? I mean technically the ‘max displacement’ could have been up or down? I considered it but decided not to