MC Question (1 Viewer)

[scaryshark09]

I think the answer might be wrong but idk. Can you give this a try and tell me what you get?

 

[carrotsss]

B

 

[nsw..wollongong]

yes i wouldve said that too

 

[scaryshark09]

yeah i said B, but answer is A.

its from ruse 2022, and i don't think answer is actually wrong cause i found the worked solutions for mc and it kinda makes sense

 

[scaryshark09]

i think its cause a = v dv/dx instead of just dv/dx

 

[carrotsss]

yeah i said B, but answer is A.

its from ruse 2022, and i don't think answer is actually wrong cause i found the worked solutions for mc and it kinda makes sense

wait I’m actually stupid yeah bc its v*dv/dx not dv/dx for acceleration I’m dumb

 

[carrotsss]

i think its cause a = v dv/dx instead of just dv/dx

screw you we posted at the same time now I look dumb

 

[scaryshark09]

thats actually funny for me, cause believe it or not, thats the first time i actually understood that.
i never knew why there was a different acceleration formula, but now i understand its cause its in terms of x, not t like it normally would be in advanced.

 

[scaryshark09]

like i could always do the question, but i didn't have that foundational knowledge

 

[jimmysmith560]

Fun fact: this question also appeared in the following papers:

• 2016 Knox Grammar School Mathematics Extension 2 trial exam.
• 2019 James Ruse Agricultural High School Mathematics Extension 1 trial exam
• 2018 James Ruse Agricultural High School Mathematics Extension 2 trial exam
• 2014 Mathematics Extension 2 HSC exam

 

[synthesisFR]

Fun fact: this question also appeared in the following papers:

• 2016 Knox Grammar School Mathematics Extension 2 trial exam.
• 2019 James Ruse Agricultural High School Mathematics Extension 1 trial exam
• 2018 James Ruse Agricultural High School Mathematics Extension 2 trial exam
• 2014 Mathematics Extension 2 HSC exam

What type database u got bro

 

[synthesisFR]

No jimmy don’t laugh it off this is some serious stuff tell me what u ppl r hiding. Rn