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For the block shown in figure, find the minimum value of P, which will just disturb the equilibrium of the system.

enter image description here

Mumbai University > FE > Sem 1 > Engineering Mechanics

Marks : 04

Years : DEC 2013

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enter image description here

F.B.D :-

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Applying static conditions of equilibrium,

ΣFy(+ve)=060+RN=0RN=60N()ΣFx=(+ve)=0PF=0  or  PμRN=0P=μRN=0.5×60=30N

(To just disturb the equilibrium force should balance the force of friction)

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