That space question...

[WhoTookMyUsername]

Two quick queries.

1) What the hell were they trying to test with it? Our ability to copy out ridiculously ugly expressions? How well we can transcribe horrible equations?

2) I was lazy. I said let = *whatever was inside the brackets of the sin and cos* and worked from there. Would I be penalised for this? Seems unfair if they want us to write out the full thing every single friggin' time.

Did that as well at point lol
Nah there would be no penalty, it's mathematically sound

[HighLatency]

part a) i got t=1/13 and i substituted that into 6800cos(pi(1.3*t-0.1)-6400 and kept getting -5703.68 which seems like a ridiculous answer. what did everyone else get?

NOOOO!!! omg I got 400km

Same

[WhoTookMyUsername]

its 400

[TheRajinator]

part a) i got t=1/13 and i substituted that into 6800cos(pi(1.3*t-0.1)-6400 and kept getting -5703.68 which seems like a ridiculous answer. what did everyone else get?

NOOOO!!! omg I got 400km

Same

yea 400 km makes lots of sense and -5703.68 makes no sense at all. Did you do exactly what i did? I did it on my calculator just now and i still get -5703.68 wtf

[datfatcat]

part a) i got t=1/13 and i substituted that into 6800cos(pi(1.3*t-0.1)-6400 and kept getting -5703.68 which seems like a ridiculous answer. what did everyone else get?

NOOOO!!! omg I got 400km

Same!

[WhoTookMyUsername]

can't remember what value of t i got, but yes, i followed the same process
i component = 0 , t -> sub in

[DJing]

Also at the end did you guys get t=0.04 and t=0.11 or something? 

[TheRajinator]

grrr and the last part, my calculator wouldn't solve for t. I defined x(t) as the i position vector and y(t) as the j position vector instead of writing it all out. than i wrote root((x(t))^2+(y(t))^2)=1000 and tried to solve for t. sigh didn't work so I left it like that. will I still get a mark?

[ZanyCat]

For the cartesian equation did you guys get x^2 + (y + 6xxx)^2 = 'the most ridiculously large number I have ever seen' ?

[WhoTookMyUsername]

yes

[TheRajinator]

For the cartesian equation did you guys get x^2 + (y + 6xxx)^2 = 'the most ridiculously large number I have ever seen' ?

yea I got something like that, and for the speed did you guys get 22777m/s or something like that?

[WhoTookMyUsername]

something like that

[ZanyCat]

I had 27772 from memory. I'm worried that for my r^2 value in the cartesian equation I didn't copy down the right amount of zeroes

[WhoTookMyUsername]

space q was ridiculous
the question about perpendicular was just like writing an essay, all mechanical no thinking involved :\

[DJing]

ZanyCat that's what I got!