Qualification > Sciences
ALL CIE PHYSICS DOUBTS HERE !!!
S.M.A.T:
--- Quote from: ashish on October 18, 2010, 02:42:22 pm ---nice work thought i posted the same working check my post , lol the answer was simple it was just that i didn't concentrate .... EXAMMMMMMMMMMMMMMMMMMs ss :-\
--- End quote ---
SORRY i didn't notice. :)...+rep for your work ;)
lana:
could someone please explain to me to estimating uncertainties ??
thanks =]
Ivo:
--- Quote from: asiftasfiq93 on October 18, 2010, 11:20:03 am ---yes this is what i meant to say :D
So when an object is in equilibrium,the frictional force will take a value equal to the horizontal force ;)
--- End quote ---
Just to make sure, so can I say for part iii) That because the system is in equlibrium, there is no resultant force acting on the skier. Therefore, the friction force exerted by the bed is said to be equal to the net horizontal forces exerted by the tension of the rope?
What I'm not sure about is should I say 'net', and should I say 'taking into account of horizontal components'.
Also, I'm not sure about the directions of Tension that should be on the question. Here's my attempt, please could someone correct me. I'm not sure if there should be a Tension force on the horizontal right at the top of the system.
Deadly_king:
--- Quote from: lana on October 19, 2010, 06:39:29 pm ---could someone please explain to me to estimating uncertainties ??
thanks =]
--- End quote ---
Try this :
http://www.astarmathsandphysics.com/a_level_physics_notes/principles_dimensions_units_error_analysis_etc/a_level_physics_notes_error%20analysis%281%29.html
If ever you need some explanation from us, post a question!
It's easier to explain when answering to an appropriate question ;)
Deadly_king:
--- Quote from: Ivo on October 19, 2010, 07:05:53 pm ---Just to make sure, so can I say for part iii) That because the system is in equlibrium, there is no resultant force acting on the skier. Therefore, the friction force exerted by the bed is said to be equal to the net horizontal forces exerted by the tension of the rope?
What I'm not sure about is should I say 'net', and should I say 'taking into account of horizontal components'.
Also, I'm not sure about the directions of Tension that should be on the question. Here's my attempt, please could someone correct me. I'm not sure if there should be a Tension force on the horizontal right at the top of the system.
--- End quote ---
Yeah..........the word net fits exactly here. Your answer is right ;)
For the tensions, I think all of them should be directed towards the pulleys. Hence the horizontals will have tensions in both directions.
But am not 100% confident about that :-[
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