With what minimum velocity should block be projected from left end $A$ towards end $B$ such that it reaches the other end $B$ of conveyer belt moving with constant velocity $v$. Friction coefficient between block and belt is $\mu$ .
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$a=\mu g$
$0^{2}=v_{0}^{2}-2 \mu g L$ or $v_{0}^{2}=2 \mu g L$
$\therefore V_{0}=\sqrt{2 \mu g L}$
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