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Physics-

General

Easy

Question

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 $mu.$ Minimum value of F to prevent block B from downward slipping is

$(\frac{3}{2 μ}) m g$
$(\frac{5}{2 μ}) m g$
$(\frac{5}{2}) μ m g$
$(\frac{3}{2}) μ m g$

The correct answer is: $open parentheses fraction numerator 5 over denominator 2 mu end fraction close parentheses m g$

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