With what minimum velocity should block be projected from left end ...

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With what minimum velocity should block be projected from left end A towards end B such that it reaches the other end \( \mathrm{B} \) of conveyer belt moving with constant velocity \( \mathrm{v} \). Friction coefficient between
P block and belt is \( \mu \).
(A) \( \sqrt{\mu \mathrm{gL}} \)
(B) \( \sqrt{2 \mu \mathrm{gL}} \)
(C) \( \sqrt{3 \mu \mathrm{gL}} \)
(D) \( 2 \sqrt{\mu g L} \)
\( \mathrm{W} \)
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