NCO9
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How did everyone find the exam?


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L'Evil Fish
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Fairly standard.

(Original post by NCO9)
How did everyone find the exam?


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Hbu ?
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L'Evil Fish
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#3
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1. pi/6, 5pi/6, 3pi/2
2. T = 3 and 5/9 s
3. P = 96000, R = 10800
4. 30i,-16j (34ms^-1)
5. 0.04m, 1.87ms^-1
6. 120m ish, doesn't land in Lake
7. 12000ishN,v=12.91ms^-1
8. Can't remember numbers but 113 degrees
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troubadour.
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Is there any chance I'm going to get method marks if I got wrong answers? This exam... Well, this and C3 have successfully nailed shut the coffin of my physics career.
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talldarkhandsome
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I had everything the same as you bar Q5
I had the velocity as sqrt(3.053) or something which came to 1.89ms^-1
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L'Evil Fish
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(Original post by talldarkhandsome)
I had everything the same as you bar Q5
I had the velocity as sqrt(3.053) or something which came to 1.89ms^-1
People seemed to have what you had, so probably right

Idk why I keep getting it
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alexball97
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(Original post by talldarkhandsome)
I had everything the same as you bar Q5
I had the velocity as sqrt(3.053) or something which came to 1.89ms^-1
I remember having something like that for the velocity. definitely 1.8 something
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alexball97
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(Original post by L'Evil Fish)
1. pi/6, 5pi/6, 3pi/2
2. T = 3 and 5/9 s
3. P = 96000, R = 10800
4. 30i,-16j (34ms^-1)
5. 0.04m, 2.03ms^-1
6. 120m ish, doesn't land in Lake
7. 12000ishN,v=12.91ms^-1
8. Can't remember numbers but 113 degrees
I got the same I think, except number 2. I think I had 2 and 14/9 or something, so must have made a mistake somewhere
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L'Evil Fish
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(Original post by alexball97)
I got the same I think, except number 2. I think I had 2 and 14/9 or something, so must have made a mistake somewhere
(Original post by alexball97)
I remember having something like that for the velocity. definitely 1.8 something
Oh **** I forgot the elastic potential energy, it was still extended at 0.45m

Answer is 1.87
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talldarkhandsome
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(Original post by L'Evil Fish)
Oh **** I forgot the elastic potential energy, it was still extended at 0.45m
Ah man unlucky :/
Though everything else seems right that's a comfortable 95%+
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alexball97
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(Original post by L'Evil Fish)
Oh **** I forgot the elastic potential energy, it was still extended at 0.45m
Yeah, and obviously that question. Forgot to mention that. I don't know where I went wrong on Q2 though.
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L'Evil Fish
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(Original post by talldarkhandsome)
Ah man unlucky :/
Though everything else seems right that's a comfortable 95%+
My projectile was wrong, I subbed in something wrong, so I got the right time but wrong distance so will lose that mark

And I'll lose very last mark

And I also didn't find speed in q 4,i left it as velocity vector

Hopefully that's an a* still
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Garrus
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#13
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(Original post by L'Evil Fish)
Oh **** I forgot the elastic potential energy, it was still extended at 0.45m

Answer is 1.87
I got 2.something i remember :/
The way i did was:
1470(0.04+0.12)^/2(0.40)=0.5x15v^+3g(0.54-0.45)
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L'Evil Fish
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(Original post by Garrus)
I got 2.something i remember :/
The way i did was:
1470(0.04+0.12)^/2(0.40)=0.5x15v^+3g(0.56-0.45)
Yeah, we both forgot to add in the extra

(1470/0.8)(0.05)²
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Garrus
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(Original post by L'Evil Fish)
Yeah, we both forgot to add in the extra

(1470/0.8)(0.05)²
AHHHHHHH! I see, Hmmm one hell of a sneaky question.
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L'Evil Fish
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#16
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(Original post by Garrus)
AHHHHHHH! I see, Hmmm one hell of a sneaky question.
I think I just went into robot mode, because it's always above natural length or at natural length, with no epe
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DanCymru
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#17
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Has anyone got a copy of the questions? I've forgotten!
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Cmog
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#18
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(Original post by Hydeman)
Is there any chance I'm going to get method marks if I got wrong answers? This exam... Well, this and C3 have successfully nailed shut the coffin of my physics career.
Yeah, you'll be fine
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strongpar
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#19
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The only one I wasn't entirely sure about was the car on the track. No tendency to sideslip -> Fr = 0, right?

I got the speed to be about 12.6 or something like that. Anyone else?
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L'Evil Fish
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(Original post by strongpar)
The only one I wasn't entirely sure about was the car on the track. No tendency to sideslip -> Fr = 0, right?

I got the speed to be about 12.6 or something like that. Anyone else?
12.91

It was

RnCos12=1200g
Rn=1200g/cos12

Rnsin12=mv²/r

v² = (80/1200)(1200g)tan12
v² = 80gtan12

Which lead to that
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