(Original post by Father Ted)
I did this initially and got a time of 0.37s... but thought that would be pretty stupid considering it would take 5s overall... so changed the velocity around to negative and got 2.5s which seemed more reasonable. So much common sense was needed on this paper.
Yeah I know, I should've thought about it more clearly. Definitely my fault there but I panicked. :/
After I finished I just went straight to the impulse question thinking, what the **** is going on here, haha.
How many marks would you lose in Q5 is you got everything right except for a small algebraic slip-up? (as in the impulse vector, direction etc. are correct but the speed is wrong) I probably didn't make a mistake but 40ms^-1 is the only number I don't remember from the exam.
(Original post by knowledgecorruptz)
Are you sure?? Would we seriously lose marks for something like this...it's entirely Edexcel's fault that I didn't get this question right! Would I still get 2 marks for working out Y and its direction? I mean, I've seen a past paper where they ask for the horizontal component and they literally just want to know if it's going left or right...
Well okay, I did better than I thought. Though I got the answer to the k mass wrong. I got 13 somehow. I got the inequality with e wrong and I also got the magnitude of the reaction wrong. So worst case scenario meaning I got no method marks, I got 61/75. Honestly coming out of that exam I felt sick and I thought I genuinely got like 30% due to how my answers were weird.
For that vertical question, I think I must apologise to my examiner since I got a little angry, underlined the word vertical, stated that it was always ninety degrees from the horizontal and that the question is wrong. Honestly that question was stupid. I got the answer wrong sure, but probably due to my rage at the wording.
The last one was really weird but I came out with 2.5 which is a relief. I did some strange z-angle thing, lol.
(Original post by Jorgeyy)
I was hoping to scrape 90 in FP2 or FP3 to allow me to mess one of them up
I prefer Core/Pure mathematics anyway and it's an incentive to work hard on these at least
Yeah, my saving grace was the fact that I know FP3 inside out, I was planning on 90 M2, 95 FP3 and 85 S2 being my marks that make the A* grade, I struggle on FP2 quite a bit, generally marking randomly between 50-85 per test.
Guess we'll see now, I can't believe today's paper though, that was horrible. Paper of death 2012 without a question.
I thought this paper was pretty standard TBH, except for the badly worded question. Thanks for the solutions Arsey. Looking forward to FP1, FP2, FP3, M3 now.
73/75 should give me 100%. Still leaves a lot for A* in FP2/FP3/M3 :/
(Original post by und)
Surely 4 marks is too little if they were expecting us to resolve vertically to find the vertical reaction force at the hinge, then horizontally to find the horizontal reaction, and then find both the angle and the magnitude of the combined forces? Normally that sort of question would be about 6 marks.
I am coming round to thinking you are right, still think it is a daft question...
that is two questions whose direction is due north...
Funny thing is I did exactyl what Arsy did for question 3-and wondered its acting only verticlally upwards so state 40.1 N--I wasted so much time panicking for this question and the stupid impulse and projectile last part-
For the projectile last part. I did was total tiem of flight - time taken for Sv=0--that works out as 2.14 if I am not mistaken
Arghh this paper!