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# Wjec AS ph1 2016

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1. (Original post by student2734)
Wasn't the force 800N? Or is that Tcos36 and I'm just being silly😂
The forward force applied (Tension in the towing thing) was Tcos36 so you would use the value you get for T from the previous part of the question (can't remember what T was, I think it was like 988N or something)
2. (Original post by student2734)
Wasn't the force 800N? Or is that Tcos36 and I'm just being silly😂
So yeah it was 800N
3. Yeah I got 115ms-1 or whatever it was for velocity and I also got 20 for the Hooke's Law question! Found it OK, hopefully got an A but yeah very high boundaries I think. Happy with the moments question though, can anyone remember any of their other answers
4. Also does anyone know how the grade boundaries are agreed on? I thought the top 5%-8% of candidates were given A's etc but my teacher said this is no longer the case. I know the raw marks for an A change each paper so how do WJEC decide on this
5. (Original post by Gracemarielewis)
Also does anyone know how the grade boundaries are agreed on? I thought the top 5%-8% of candidates were given A's etc but my teacher said this is no longer the case. I know the raw marks for an A change each paper so how do WJEC decide on this
I was also under the impression that it's the top 8% that get A's so WJEC would alter the boundaries accordingly. If this is not the case then I don't know how else they could decide.
6. (Original post by student2734)
Yeah I got 117m/s so probably some rounding errors did you have to put the angle that it arrived at the ground as well?
I do not think that is a rounding error, I got that as part of my calculation for the final vertical velocity, however you had to incorporate the unchanged horizontal velocity aswell and use Pythagoras so it was like root(117)^2+(34..)^2 which gives 115..ms^-1. You should still get a mark or so.
7. (Original post by TheLazyKid)
I don't think you had to as it would have said 'magnitude and direction' as well
Yes you did not need the angle, it only stated the final velocity, not direction.

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