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Questions  

In figure coefficient of friction between m1 and m2 is 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 is:

a
μm1g
b
μm2g
c
μm1+m2g
d
system cannot be held in equilibrium

detailed solution

Correct option is D

At any time, we can balance only mg force by frictional force, which shows system cannot be held in equilibrium.

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