With what minimum velocity should block be projected from left end \( \mathrm{A} \) towards end ...

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