Qualification > Sciences

FRICTION !!!!!!!! HELP!!!!

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~~~~shreyapril~~~~:
ohh!!

so this is iit!!
thatswhat iwas thining how can A levels be so tough!!!

astarmathsandphysics:
here

nid404:

--- Quote from: astarmathsandphysics on November 02, 2009, 02:22:03 pm ---here

--- End quote ---

that makes it easier. thanks :)

nid404:
There r a few more. Please answer them asap....I'm so screwed for my major test :(


Q. A steel ball is suspended from the ceiling of an accelerating carriage by means of two cords A and B. Determine the acceleration- a of the carriage which will cause the tension in A to be twice that in B

Ans-g/3 X root3

I don't even know where to begin from in this one. I'm flunking this test or sure

nid404:
In the figure shown, friction force between the bead and the thread is mg/4. Find the time in which the bead loses contact with the string after the system is released from rest.

Ans- t= root of (8l/7g)

I'm getting root (8l/3g) ???

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