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In figure coefficient of friction between m₁ and m₂is μ and that between m₁ and the wall is zero. A force F is pressing the system against the wall. Minimum value of force required to hold the system in equilibrium if coefficient of friction between m₁ and the wall is μ, and, f₁ and f₂ are, respectively, the force of friction on m₁and m₂,then:

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An Intiative by Sri Chaitanya

f₁ and f₂ both are downward

f₁ and f₂ both are upward

f₁ is upward and f₂ downward

f₁ is downward and f₂ upward

answer is B.

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Detailed Solution

f₁ and f₂ must act upward to balance weight of blocks.

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