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

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written 8.2 years ago by

teamques10 ★ 69k

modified 3.1 years ago by

pedsangini276 • 4.8k

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Mumbai University > FE > Sem 1 > Engineering Mechanics

Marks : 04

Years : DEC 2013

engineering mechanics

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written 8.2 years ago by

teamques10 ★ 69k

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F.B.D :-

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Applying static conditions of equilibrium,

$∴Σ F_y (↑ +ve)=0 \\ ∴ -60+ R_N=0 \\ ∴R_N=60N ( ↑) \\ ∴Σ F_x=(→ +ve)=0 \\ ∴P-F=0\space\space or\space\space P- μR_N=0 \\ P= μR_N=0.5 ×60=30N $

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

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