• Best of luck to the class of 2025 for their HSC exams. You got this!
    Let us know your thoughts on the HSC exams here

Solutions (1 Viewer)

rippletzhou

New Member
Joined
Oct 16, 2005
Messages
6
Location
sydney
Gender
Female
HSC
2005
rachey_poo said:
really?!?!?! near 40??? maybe i did something right?!?!
lol
i think i got roughly for (ii) between 40 and 56 or something, and then got 49 or so for (iii)....but as i said, just really made it up!
thanks for 3dii).....now i know...lol stupey
i think i got the same result as u did. anyway, i am not sure whether it was right or wrong. just made them up. but i am glad there's someone who got the same answer as i did.
 

thunderdax

I AM JESUS LOL!
Joined
Jan 28, 2005
Messages
278
Location
Newcastle
Gender
Male
HSC
2005
I wrote my answers for Q6+7 in the book. Here they are:
6a)ii) 0.01
iii) 0.92
b) i) 7041m, forgot to write time.
ii) 40.82<t<55.76
iii) 49.72
7ai) 102.59m
ii) 20.53m/hr.
and (b) was all show thats.
 

haboozin

Do you uhh.. Yahoo?
Joined
Aug 3, 2004
Messages
707
Gender
Male
HSC
2005
phoenix88 said:
yea my bad -- doin these as fast as i can so mistakes will happen lol :p

just do the solutions to all of em - put it in one word file and give it to Timbk to put it on the first post

i hate this searchign everywere to see how much i got
 

jaafar

u rock my world
Joined
Nov 30, 2004
Messages
15
Location
milky way
Gender
Male
HSC
2005
thunderdax said:
I wrote my answers for Q6+7 in the book. Here they are:
6a)ii) 0.01
iii) 0.92
b) i) 7041m, forgot to write time.
ii) 40.82<t<55.76
iii) 49.72
7ai) 102.59m
ii) 20.53m/hr.
and (b) was all show thats.
can u plz post the worked answers for q3 parts a and d
 

richz

Active Member
Joined
Sep 11, 2004
Messages
1,348
thunderdax said:
I wrote my answers for Q6+7 in the book. Here they are:
6a)ii) 0.01
iii) 0.92
b) i) 7041m, forgot to write time.
ii) 40.82<t<55.76
iii) 49.72
7ai) 102.59m
ii) 20.53m/hr.
and (b) was all show thats.
nice answers, got similar q6 answers :)
 

LuKiN

Member
Joined
Nov 29, 2004
Messages
38
Gender
Male
HSC
2005
fuck.... looking at those answers... fuck! too many silly mistakes.
 

stv_87

New Member
Joined
Oct 20, 2005
Messages
24
Gender
Male
HSC
2005
c iii is WRONG your second last line to last stuffed up, u should have timesd the 3a by a making it x squared equals a(y-3a)
 

DRAGONZ

You've Got A Friend
Joined
Dec 22, 2004
Messages
1,100
Location
Australia
Gender
Male
HSC
2005
Damnnnnn I'm pissed off.

Staying up to 1am last night finishing the 2001 paper (which I got 79/84 in) f*cked me up.

My mind wasn't there today, and I was going slow and generally not thinking enough about my answers.

I had to skip 6 (ii) and (iii) to go onto question 7.

I promptly got home, took the test out, and did those two parts inside five minutes.

I had 66/67 up to that point because of a mindblock in 3d(ii).

After doing badly in four unit, I reckon I needed a final mark of about 97 or 98 for three unit.

... And I can't see a final mark of 77/84 (I got 11/12 for question 7, I'm pretty sure) getting me that 98

Oh well. If only I'd gone to bed an hour earlier ... or taken Red Bull before the exam
 

stv_87

New Member
Joined
Oct 20, 2005
Messages
24
Gender
Male
HSC
2005
6 b iii shouldnt the inequality sign be reversed like 350squared greater than the equation u have notless than

my calculator is screwed i did your exact equation in the exam and it came up with 0.66something, lol i left my answer in working then just wrote o.79 after so tick i guess. thats the world of computers for u
 
Last edited:

DRAGONZ

You've Got A Friend
Joined
Dec 22, 2004
Messages
1,100
Location
Australia
Gender
Male
HSC
2005
stv_87 said:
6 b iii shouldnt the inequality sign be reversed like 350squared greater than the equation u have notless than
No. Maximum velocity is 350m/s. He has to eject himself before it reaches 350m/s ... well actually, right as it hits 350.

So for that to happen, 350 </= root [ (horizontal velocity)^2 + (vertical velocity)^2 ]

Goddamn so simple.
 

tim_dawborn

Member
Joined
Sep 20, 2004
Messages
41
and question 7 -- brain is dying atm so b)ii) has no answer
feel free to correct it :p

doin question 3 now for those who wanted it
 

stv_87

New Member
Joined
Oct 20, 2005
Messages
24
Gender
Male
HSC
2005
so is the rocket accelerating as it goes closer to the ground cause i reacted as though it was slowing down, i stuffed that anyway i did your method but ended with 483 seconds
thats what u get for dropping physics forgetting gravity
 

darkwarrior2

Member
Joined
Apr 29, 2005
Messages
52
Location
happy hardcore
Gender
Male
HSC
2005
Omg

OMG, i got .123... for question 7ai) as the answer and then i thought it couldnt be cos its kind of similar to .1 radians....and i crossed it out >< ! ffffffffffffffffffffffffffffffffffffffffffffssssssssssssss !!!!!!
 
Last edited:

datacore

New Member
Joined
Oct 25, 2004
Messages
20
Location
Sydney
Gender
Male
HSC
2005
question 7aii

dr / da = 1/2 x 2050 sec^2 (a/2)

then u get 20.55m/hour

thats what i had
 

renya

New Member
Joined
Dec 1, 2004
Messages
27
Gender
Female
HSC
2005
darkwarrior2 said:
OMG, i got .123... for question 7ai) as the answer and then i thought it couldnt be cos its kind of similar to .1 radians....and i crossed it out >< ! ffffffffffffffffffffffffffffffffffffffffffffssssssssssssss !!!!!!
even if you cross an answer out dont the markers mark it?
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top