Maths M1....

[Talha]

can any1 plz explain me da whole ques no. 7... its freaking confusing!!!

9709_s10_qp_43.pdf

http://www.xtremepapers.me/CIE/inde...l/9709 - Mathematics/&file=9709_s10_qp_43.pdf


Plz any1 explain step by step telling da reasons for taking normal reaction and friction values... Thnx

 

[Saturation]

Yeah, same here! pls help!

 

[kakarocks]

Had to do some thinking and here goes nothing

7(i)- F= Meu x R

R= weight of both boxes = 450 x 10 = 4500 N

Since the maximum value of P for the boxes to remain staitonary is 3150

3150 = Meu x 4500

Meu = 0.7


(ii) The max frictional force between box a and b = f= meu x R

f= 0.2 x 4500
f= 900 N
the max accelaration for the boxes to not slip over each other = f =ma
900 = 450a
a=2

(iii) The max possible value of P = Total friction = 3150 + 900 = 4050 N


Best of luck for exams