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M1 OCR

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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:

--- Quote from: Ari Ben Canaan on October 16, 2010, 06:36:57 am ---Is coefficient of friction 0.5 ? Did you get that ?

--- End quote ---

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

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