Qualification > Sciences
ALL CIE PHYSICS DOUBTS HERE !!!
Rvel Zahid:
--- Quote from: ashwinkandel on April 10, 2012, 01:45:54 pm ---Rvel Zahid Unless someone else answers your questions , I will answer it tomorrow.
--- End quote ---
Ok brother dats so nice of you. i don't need urgent answers, so its ok no problem. Take care :)
Rvel Zahid:
http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w08_qp_1.pdf
need help in 11 and 32
haris94:
--- Quote from: Rvel Zahid on April 11, 2012, 08:33:08 pm ---http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w08_qp_1.pdf
need help in 11 and 32
--- End quote ---
q11:
F=ma
For the 2kg box 20-T=2a
20 is the weight of the box ; T is the tension in the string ; 2 is the mass of the box ; a is the acceleration
For the 8kg box T-6=2a
6 is the frictional force
Solve both simultaneously and you get a=1.4
Answer is A
haris94:
--- Quote from: Rvel Zahid on April 11, 2012, 08:33:08 pm ---http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w08_qp_1.pdf
need help in 11 and 32
--- End quote ---
q32:
i need someone to please confirm this.
here's my theory - the steel cable will not be responsible for the resistance of the power cable since it is enclosed within the copper cables.
Now all the 6 copper cables are in a circle so i think it should be taken as if they are all parallel to each other.
So 1/R = (1/10)*6
R=1.67
Answer is B
SkyPilotage:
I think the resistance of the steel cable is included for 2 reasons:-
1- Answer will be 1.64 i.e closer to B
2- They wouldnt have given you the value, never seen CIE do sth like that from year 2000 Examinations :P
What do you think?
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