Three blocks \( A, B \) and \( C \) of equal masses \( m \) each are placed one over the other...

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Three blocks \( A, B \) and \( C \) of equal masses \( m \) each are placed one over the other on a frictionless table. The coefficient of friction between any two blocks is \( \mu \). Find the maximum value of mass of block \( D \) so that the blocks \( A, B \) and \( C \) move without slipping over each other.
(a) \( \frac{3 m \mu}{\mu+1} \)
(b) \( \frac{3 m(1-\mu)}{\mu} \)
(c) \( \frac{3 m(1+\mu)}{\mu} \)
(d) \( \frac{3 m \mu}{(1-\mu)} \)
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