Qualification > Sciences
ALL CIE PHYSICS DOUBTS HERE !!!
Deadly_king:
--- Quote from: ashish on October 17, 2010, 02:44:17 pm ---i have a doubt, the 122 N will be the tension in the inclined string which will cause the upward lift?
--- End quote ---
I don't think the upward lift is applied here.
The tension along the whole piece of string will be the same. (122 N)
lana:
hey guys !! =]
do you have any advice on how to prepare for the practical paper 3 ?? and could someone please explain to me an easy way to find uncertainties ??
thank you...
ashish:
--- Quote from: Deadly_king on October 17, 2010, 02:52:12 pm ---I don't think the upward lift is applied here.
The tension along the whole piece of string will be the same. (122 N)
--- End quote ---
hey deadly i kept on thinking on it ,the tension in the string cannot be 122N throughout it has to be 9.81*8 !
S.M.A.T:
--- Quote from: Deadly_king on October 17, 2010, 01:14:11 pm ---Do you mind to explain how you got your answers ???
b)(iii) It's not necessary that resultant is zero. The frictional force between the bed and the body of the skier may be greater or equal to the horizontal force.
@ ashish : Weight cannot be the answer since the latter acts vertically downwards ans will have no horizontal component ;)
--- End quote ---
DK :D frictional force cannot be greater than the horizontal force,if it was greater than the body will start to move to the left ::) .But u can still say that this is not the maximum frictional force that the bed can apply on the body because the question did not said that the body is in limiting equilibrium so if horizontal force increase than the frictional force will increase.
Since the body did not move(i.e. in equilibrium) that means frictional force=horizontal force
I hope u understood what i said :)
nid404:
Limiting friction is greater than the horizontal force. Friction can take any value from 0 to uR.
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