M1 OCR

[nid404]

 the 2nd part of the attached question, I dunno why I am not confident abt my answer. I don't have the mark scheme, so I want to confirm my answer with you guys.

I get P as 13.2 N...If someone could verify the answer, it would be great 

[elemis]

I'll do it.

[elemis]

Is coefficient of friction 0.5 ? Did you get that ?

[nid404]

Is coefficient of friction 0.5 ? Did you get that ?

yup

[elemis]

Okay, I think your answer is wrong.

This is what I did for the last part.

R - Pcos60 - 3g = 0

hence, R = Pcos60 + 3g

Next, Pcos30 - 0.5(Pcos60 + 3g) = 0

Hence P = 23.9 N

[elemis]

I did this in a hurry as I have to go for breakfast. Tell me if you think I'm right/wrong.

[nid404]

Oh yes

R will be the sum of 3g and Pcos 60.

I took R as 3g-Pcos60 I didn't see the direction of the force. My bad.

Thanks 

[elemis]

No worries.

I find it easier if you draw a set of axis and draw in the force vectors.

[nid404]

I feel lazy And end up making silly mistakes 

Okay I want to cross check my answers for this one too. Just post the answers. If they differ, then you need to take the pains to type the whole thing , else not 

Take your time 

[elemis]

Did you read my PM ?

Which year is this from ?

[elemis]

I'm on it.

[nid404]

Did you read my PM ?

Which year is this from ?

Yeah I replied...check check!!

June 2005 M1

[elemis]

http://www.xtremepapers.net/OCR/Maths/2005%20Jun/L_A_Level_Maths_MS_Jun_05.pdf

[nid404]

I got them right

Thanks 

[nid404]

By the way it was jan...i got the ms for it  thanks for the ocr directory...I should ask astar to upload them on FEP too