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Cool goIITian

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29 Oct 2009 21:25:19 IST

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A block of mass m placed on an inclined plane of inclination 37 degree with horizontal. .

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A block of mass m placed on an inclined plane of inclination 37 degree with horizontal. . What must be the frictional force between block and incline if the block is not to slide along the incline when the incline is accelerating to the right at 3 m/s^2 .

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umesh

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Joined: 23 Oct 2009

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29 Oct 2009 21:44:10 IST

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let the angle between N and F is A

now

N+Fcos A =mg sin A

where F =ma

for given condition

Fr>= m[a sinA+gcos A]

where a= 3 m/s^2

and A = 37 degree

Aman Nautiyal

Cool goIITian

Joined: 8 Apr 2009

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29 Oct 2009 22:24:40 IST

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but the ans is9/25mg.

umesh

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29 Oct 2009 22:29:22 IST

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I think in the question coefficient of friction has been asked.

if yes then put Fr= cN

where c =coefficient of friction

ghfh bgd

Cool goIITian

Joined: 21 Apr 2009

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30 Oct 2009 00:31:54 IST

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ghfh bgd

Cool goIITian

Joined: 21 Apr 2009

Posts: 70

30 Oct 2009 00:32:42 IST

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i forgot

f=frictional force

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