Qualification > Sciences

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

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123:
hey nid about that wedge n block.....heres what i did wit my m1 knowledge n a lil thinkin  :P


Since all surfaces r frictionless, the wedge resting on ground would slip as the block moves down. So i guess v need to split the component of block's weight (4mg) into a force pushing the wedge... so that it slips left
I don't think this is the right way...mayb astar can help
Interestin ques...even i wanna know the answer  :D

did u ask in goiit.com?

nid404:
Thanks for givin it a try :)

I saw that site. I registered but I'm still to ask questions there....thanks a lot tho :D

astarmathsandphysics:
For the pulley when the string is cut there is a resultant for ce mg due to the tension in the spring acting on a total mass of 3m hence using F=ma
mg=3ma so a =g/3
(The tension initially is 4mg becasue`the system is in equilibrium)

resolving vertically for A
T-mg=ma
and for B
2mg-T=2ma
solve these to get a=g/3
so the acceleration of A is g/3+g/3=2g/3 and the acceleration of B is g/3-g/3=0

astarmathsandphysics:
For the black and wedge problem try this attachement

nid404:
thanks sir... :)

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