M1 24/05/12

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Reply 20

Perpetuallity

Original post by cazman34

How about the acceleration of the particle moving down the slope? Tell me you got 1.06ms^-2 as well haha

1.05 m/s^2 so yeah, close enough

Edit: I rounded alpha here

(edited 11 years ago)

Reply 21

priteshp

For that last question were we ment to split the shapes into two or three? Bc I split it into 3. And has anyone got the paper??

Reply 22

cazman34

What did everyone get as alpha?

Reply 23

Astonix

I found the test today really quite nice, in comparison to all the other papers.

I got stuck on finding the tension AP (question 6) because I managed to skip over the part which said P had a weight, so ended up with the tension equal to 0. Realised my mistake in the end.

Other question I probably lost a mark on is the height the sky diver fell. I rushed it and got height is aprox. 817.3m or something similar to that. Anyone else get that?

Reply 24

RoundNRound

Original post by cazman34

How about the acceleration of the particle moving down the slope? Tell me you got 1.06ms^-2 as well haha

I got that :smile:

Reply 25

cazman34

Original post by Astonix

I got something around 817.3 too, probably exactly that :P

Reply 26

Astonix

Original post by priteshp

For that last question were we ment to split the shapes into two or three? Bc I split it into 3. And has anyone got the paper??

I split it into 3. You were meant to I think. They drew dotted lines splitting it up into three, and I don't know a simple way of finding the area and CoM of an L-shape without splitting it into 2.

Reply 27

Astonix

Original post by cazman34

What did everyone get as alpha?

If you're on about question 6, I got alpha as about 54 I think.

Reply 28

Perpetuallity

Original post by cazman34

I got something around 817.3 too, probably exactly that :P

807.5m if I remember rightly

Reply 29

ConstantlyStressed

Original post by cazman34

What did everyone get as alpha?

Which one? I remember alpha being 52.57 or something..

I thought the exam went really well :smile:

I'm glad that no trick questions were thrown out there; I was panicking like mad prior to the exam.

Does anyone remember what they got for v on question 7 - the hot air balloon question? I got 49, which for some reason doesn't seem right.

Reply 30

priteshp

Original post by Astonix

I split it into 3. You were meant to I think. They drew dotted lines splitting it up into three, and I don't know a simple way of finding the area and CoM of an L-shape without splitting it into 2.

Pheww I can't remember my answer most probs got most of marks for that anyways.

Any grade boundaries prediction?????

Reply 31

ConstantlyStressed

Original post by Perpetuallity

807.5m if I remember rightly

Ah yes, I got that :smile:

Really happy now!

Reply 32

Perpetuallity

Original post by ConstantlyStressed

Which one? I remember alpha being 52.57 or something..

I thought the exam went really well :smile:

Yep, that's what I got :smile:

v=u + at = 0 + 5(9.8) = 49m/s

(edited 11 years ago)

Reply 33

priteshp

Original post by ConstantlyStressed

Which one? I remember alpha being 52.57 or something..

I thought the exam went really well :smile:

That is right what's what I got

Reply 34

ConstantlyStressed

Original post by Perpetuallity

Yep, that's what I got :smile:

v=u + at = 0 + 5(9.8) = 49m/s

Yes...I feel so relieved...

Now I've got C4 to study for..blegh :mad:

Reply 35

CTRSohcan

Yeah, I seem to be getting what others are getting. Some numbers I remember: 807.m for the SUVATs question, 29000N and 60kg for 1. a and b respectively. 0.4m for the equilibrium question. Coefficient of Restitution = 0.36. I remember a 41.2N, and alpha equaling 57.? somewhere.

A nice paper overall, I think I've lost some marks at the end of Question 3 and 9, but I got the main marks anyway. Hopefully the A grade boundary is around 58~

Reply 36

priteshp

So for that alpha question did ppl do tan-1 the number they gave for the angle???

Reply 37

Astonix

Original post by priteshp

So for that alpha question did ppl do tan-1 the number they gave for the angle???

I used,

(Rcos(\theta))^2 + (Rsin(\theta))^2 = 30^2 + 4g^2

and as you (should) know, the cos^2 and sin^2 cancel to 1, so left with R, which I then plugged back in to previous equations to get alpha.

I checked it with the tan method in the exam too and came out with the same answer.