2010- sm-exam2 solutions

[jihan1234]

sm exam 2 solutions

[ghadz7]

I better not look at it

[98.40_for_sure]

Just letting you know, you're missing Questions 3 and 4 of the extended response. It skips from Q1 to Q5

[supernatural]

Just letting you know, you're missing Questions 3 and 4 of the extended response. It skips from Q1 to Q5

yep he's rite theres no solutions to q 3 and 4

[letsride]

for the labelling forces, i labelled friction just as mu, ie U not UN, will i lose a mark?

[CharlieW]

oh crap similarly, i labelled friction as simply F, not f=mu x N, i defined F as friction force next to it

but all it asked as to label it, i mean if i defined friction as F, that can't be wrong,

[m@tty]

for the labelling forces, i labelled friction just as mu, ie U not UN, will i lose a mark?

Yep, that's wrong.

@CharlieW: you shouldn't lose a mark for that - as you said, we were only asked to label..

[CharlieW]

sweet thanks man, thats at least some peace of mind haha

[tram]

sweet thanks man, thats at least some peace of mind haha

haha exactly what i did.... the way dr he ingrained it into our heads to do it

[jihan1234]

here is the rest

[m@tty]

Hmm, for 4.c) you were meant to bring out on the denominator as and then, as , make it and cancel accordingly. I don't think the little "" under the working will be sufficient.

If this is what you did in the exam, assuming you did the exam, you would most likely lose a mark.

[Chavi]

For question 4c, you have to distinctly include a modulus function in the denominator (sqrt(x^2))=Mod(x).) This clearly follows on with the next question where the gradients are the negative of each other due to Mod(x)=-x for x<0.

Edit: Beaten

Otherwise, everything looks good (although I only skimmed through it).

[98.40_for_sure]

Counted about... 15 marks lost at the very least. *bangs head*

[Linkage1992]

Well, if it makes you feel better, I'm at 18, not counting the stupid mistakes lying everywhere  :uglystupid2:

[CharlieW]

Hmm, for 4.c) you were meant to bring out on the denominator as and then, as , make it and cancel accordingly. I don't think the little "" under the working will be sufficient.

If this is what you did in the exam, assuming you did the exam, you would most likely lose a mark.

disagree you won't lose the mark, ive done it like a million times and stuff not putting the modulus even though ur supposed to be, but coz x >0 u can leave it out they won't crucify u over it. its better to put it in and then reject it, but i doubt ud lose the mark, it all depends on the examiner i guess.

i remember last year for methods, i forgot to put in plus c and chuck in initial conditions to find that c=0. i just forgot it and i didn't lose marks on both double marking.