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EXAM2 THOUGHTS +ANSWERS

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hakeemthedream:
i didnt get that

accidently used stupid position vector

aaggh

and got one other small thing wrong in the mechanics question - very stupid

and a mark somewhere else

max 5

pllus 5 off in first one (awful mistakes)

45 raw? is it possible?

Matt89:

--- Quote from: "Ahmad" ---The velocity was something like 30i + 40j - 4k. If you imagine the angle that makes with the horizontal.. that's like 50 on one side and 4 on the other. So it'll be very small. I agree with the 4.6 or whatever.
--- End quote ---


Sorry but where does the 50 come from?

Ahmad:
rt[30^2 + 40^2]

In reality though, I didn't do it this way. I used a vector method. I only mentally thought of this way as a check for reasonableness.

Matt89:

--- Quote from: "Ahmad" ---rt[30^2 + 40^2]

In reality though, I didn't do it this way. I used a vector method. I only mentally thought of this way as a check for reasonableness.
--- End quote ---


Oh i just figured it out! dammit! For some reason i totally ignored the i and j component and thought "angle with the runway.... the k component determines altitude, so only that bit matters". stupid, stupid, stupid..... Oh well, only 2 marks, my total marks lost is probably about 15. Hopefully i still get a 35+ RAW

bilgia:
i made a mess of that question....

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