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M1 OCR (Not MEI) Exam - 9/06/2015

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Original post by ms8061
is that line connecting the two what you took to be the resultant? cus its not. resultant would start from the particle


Original post by newy181818
the 6N force should be coming of the top of the 10 N force... nose to tail...


ah..... it is like i have never done m1 before well crap :frown: looking at xzanda's solutions i htink i got 45.... hoping that is at least 60 ums so i can get 320
Now I'm thinking it might have gone quite bad. Damn it.
Original post by xsanda
Xsanda's solutions:



Collision question


Cycling question
3i) 20km, 5hrs [3]
3ii) 7 hrs [3]
3iii) 50km [2]


Im sure i) was 15 km travelled, therefore 15/4 was the time taken.
Original post by wat a wizard
T for grpah question was 5.125
36. something for the distance travelled


Everyone I spoke to got 7 hours...
Original post by chloe-jessica
Okay so I was asked to do Q5 and 6, my answers were:
5i - 1.04
5ii - 1.06
5iii - 0
5iv - 0
6i - 68
ii - 78
iii - 132
iv - 7
Just want to reiterate, these are my solutions. I think they're right but they may not be. Hope it went well for everyone :smile:


These sound about right to me.
Original post by xsanda
Xsanda's solutions:

Falling question
1i) v=28 [2]
1ii) s=6.384 [2]
1iii) t=0.598 [3]

Collision question
2i) u=6 [4]
2ii) m=0.2 [4]

Cycling question
3i) 20km, 5hrs [3]
3ii) 7 hrs [3]
3iii) 50km [2]

110° tick
4i) 9.74N, 35.4° [6]
4ii) 10.3N [1]
4iii) 54.6° [2]

θ force
5i) 1.04 [3]
5ii) 1.06 [3]
5iii) a=0 [3]
5iv) a=0 [2]

Coalescing
6i) v=68 [4]
6ii) s=78 [4]
6iii) k=132 [1]
6iv) v=7 [5]

Prism
7i) a=0.7 (show that), T=1.68 [5]
7ii) v=1.26 [2]
7iii) -a = 0.9 [2]
7iva) T=1.2 [3]
7ivb) Fr = 1.12 [3]

Git the exat same answers......exam was awesome. Yesterday i thought i was gonna get a C
I hope you're right I got all of those apart from 5iii but I made a stupid error there so I know I was wrong on that one!

Original post by xsanda
Xsanda's solutions:

Falling question
1i) v=28 [2]
1ii) s=6.384 [2]
1iii) t=0.598 [3]

Collision question
2i) u=6 [4]
2ii) m=0.2 [4]

Cycling question
3i) 20km, 5hrs [3]
3ii) 7 hrs [3]
3iii) 50km [2]

110° tick
4i) 9.74N, 35.4° [6]
4ii) 10.3N [1]
4iii) 54.6° [2]

θ force
5i) 1.04 [3]
5ii) 1.06 [3]
5iii) a=0 [3]
5iv) a=0 [2]

Coalescing
6i) v=68 [4]
6ii) s=78 [4]
6iii) k=132 [1]
6iv) v=7 [5]

Prism
7i) a=0.7 (show that), T=1.68 [5]
7ii) v=1.26 [2]
7iii) -a = 0.9 [2]
7iva) T=1.2 [3]
7ivb) Fr = 1.12 [3]
Reply 387
Avatar for xsanda
xsanda
2
Original post by wat a wizard
Im sure i) was 15 km travelled, therefore 15/4 was the time taken.


A went at 20 km/h for 1 hr, so 20 km. Be went at 4km/h for 20 km, so 5 hrs
Reply 388
Avatar for TheRAG
TheRAG
2
I got k = 126 but still got v = 7
Reply 389
Avatar for TheRAG
TheRAG
2
Original post by TheRAG
I got k = 126 but still got v = 7

Or was it -7?
Original post by xsanda
Xsanda's solutions:

Falling question
1i) v=28 [2]
1ii) s=6.384 [2]
1iii) t=0.598 [3]

Collision question
2i) u=6 [4]
2ii) m=0.2 [4]

Cycling question
3i) 20km, 5hrs [3]
3ii) 7 hrs [3]
3iii) 50km [2]

110° tick
4i) 9.74N, 35.4° [6]
4ii) 10.3N [1]
4iii) 54.6° [2]

θ force
5i) 1.04 [3]
5ii) 1.06 [3]
5iii) a=0 [3]
5iv) a=0 [2]

Coalescing
6i) v=68 [4]
6ii) s=78 [4]
6iii) k=132 [1]
6iv) v=7 [5]

Prism
7i) a=0.7 (show that), T=1.68 [5]
7ii) v=1.26 [2]
7iii) -a = 0.9 [2]
7iva) T=1.2 [3]
7ivb) Fr = 1.12 [3]

Agree with all of these apart from 4ii/iii but thats because I had about 20 seconds to do them. I also forgot to divide 6iv by 2 so I got 14. Other than that we agree completely
Original post by TheRAG
I got k = 126 but still got v = 7

IIRC, the value of k didn't affect what you got in the next question as you had to differentiate to find the velocity?
Was it okay that I used the cosine rule for the resultant on the 10N and 6N?
Reply 393
Avatar for lolkik
lolkik
how is it 9.74??
Original post by xsanda
A went at 20 km/h for 1 hr, so 20 km. Be went at 4km/h for 20 km, so 5 hrs
I see. For 7)iv)b) do you know what the question was?
Reply 395
Avatar for TheRAG
TheRAG
2
I made a stupid error on 7iii and got a=-0.757, will I get ECF for the last 2 parts?
Original post by Scienceguy164
Agree with all of these apart from 4ii/iii but thats because I had about 20 seconds to do them. I also forgot to divide 6iv by 2 so I got 14. Other than that we agree completely


questions 5 im pretty sure is wrong as it can also accelerate upwards
Original post by smoothER
Was it okay that I used the cosine rule for the resultant on the 10N and 6N?

I did that too, did you get 13.3 ish?
Original post by chloe-jessica
Okay so I was asked to do Q5 and 6, my answers were:
5i - 1.04
5ii - 1.06
5iii - 0
5iv - 0
6i - 68
ii - 78
iii - 132
iv - 7
Just want to reiterate, these are my solutions. I think they're right but they may not be. Hope it went well for everyone :smile:


im pretty sure your q 5s are wrong as it can also accelerate upwards
What do you think the mark for an A will be? im guessing 57

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