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Cool goIITian

Joined:	17 Jul 2008
Post:	42

20 Feb 2009 21:49:44 IST

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Its a tough question regarding force and free body diagram...........

None

If the man manages to keep himelf at rest on platform,as shown, find the acceleration of the system masses m and M. All pulleys are light and frictionless .Also find the force the man has to exert on string .

ANSWERS:

acc= (7m -M)/(49m +M) *g

force = (216mM)/(343m +7M) *g

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Comments (5)

pink_ele

Blazing goIITian

Joined: 16 Jan 2007

Posts: 1836

21 Feb 2009 07:11:21 IST

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pink_ele

Blazing goIITian

Joined: 16 Jan 2007

Posts: 1836

21 Feb 2009 08:10:08 IST

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however solving dis ...we get T=8mMg/(49m+M)....

so force exerted=4T=32mMg/(49m+M)......=242mMg(343m+7M)

please tell me where have i gone wrong!

bhuvesh

Cool goIITian

Joined: 17 Jul 2008

Posts: 42

21 Feb 2009 11:32:24 IST

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i dont know where u hve gone wrong coz i also want the solution to it but u seem to be right can u help me in explaining again about the relation in acc..i dint get only that partbut thx

bhuvesh

Cool goIITian

Joined: 17 Jul 2008

Posts: 42

21 Feb 2009 11:40:25 IST

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hey thanks man i got that

ronit arora

Cool goIITian

Joined: 3 Dec 2008

Posts: 35

21 Feb 2009 11:41:06 IST

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pink_ele is right!!!!!!!!

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