The system is pushed by a force F as shown in the figure. All surfaces are smooth except between B and C. Coefficient of friction between B and C is μ . Minimum value of F to prevent block B from downward slipping is
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a
32μmg
b
52μmg
c
52μmg
d
32μmg
answer is B.
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Detailed Solution
a=FmA+mB+mC; ;FBD of A, F - N1 = mAaFBD of B, N1 - N2 = mBa
The system is pushed by a force F as shown in the figure. All surfaces are smooth except between B and C. Coefficient of friction between B and C is μ . Minimum value of F to prevent block B from downward slipping is