In the diagram shown, the blocks \( A \) and \( B \) are of the same mass \( M \) and the mass o...
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0In the diagram shown, the blocks \( A \) and \( B \) are of the same mass \( M \) and the mass of the block \( C \) is \( M_{1} \). Friction is present only under the block \( A \). The whole system is suddenly released from the state of rest. The minimum coefficient of friction to keep the block \( A \) in the state of rest is equal to
(a) \( \frac{M_{1}}{M} \)
(b) \( \frac{2 M_{1}}{M} \)
(c) \( \frac{M_{1}}{2 M} \)
(d) None of these
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