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:
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a
μm1g
b
μm2g
c
μm1+m2g
d
system cannot be held in equilibrium
answer is D.
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Detailed Solution
At any time, we can balance only mg force by frictional force, which shows system cannot be held in equilibrium.
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: