Question

#
In the situation shown as figure a block of
mass in is supported On the front surface of a
bigger block of mass 3m. The friction coefficient between
vertical Surface of 3m and m is u. find a
minimum magnitude of horizontal force F required
to be applied so that m will remain at rest wrt 3m​

Answer 1

Answer:

you ask this question

Explanation:

so hard for me

Answer 2

Answer:

N1

Explanation:

N

1

=mg+mg=2mg

N

2

=mgcosθ+masinθ

Here, f

1

and f

2

are the frictional force and force masinθ is pseudo force and acceleration of the system is a

F−f

1

=(m+m)a

a=

2m

F−2μmg

If block start slipping then

macosθ=mgsinθ+f

2

macosθ=mgsinθ+μ(mgcosθ+masinθ)

a(cosθ−μsinθ)=g(sinθ+μcosθ)

a=

(cosθ−μsinθ)

g(sinθ+μcosθ)

2m

F−2μmg

=

(cosθ−μsinθ)

g(sinθ+μcosθ)

F=2m[μg+

(cosθ−μsinθ)

g(sinθ+μcosθ)