The system is pushed by a force F as shown in figure. All surfaces are smooth except between B and C. Friction coefficient between B and C is μ. Minimum value of F to prevent block B from downward slipping is
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a
b
c
d
answer is B.
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Detailed Solution
acc,of system = F/5mN = 2ma = 2F/5for B to slide down µN ≥ mBg