A body of mass $m$ moves with a velocity $v$ on a surface whose friction coefficient is $\mu$. If the body covers a distance $s$ then $v$ will be:
- A$\sqrt{\mu g s}$
- B$\sqrt{\mu gs / 2}$
- C$\sqrt{2 \mu g s}$
- D$\sqrt{3 \mu g s}$
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