A) \[\frac{g\mu }{V}\]
B) \[\frac{g}{V}\]
C) \[\frac{V}{g}\]
D) \[\frac{V}{g\left( \mu \right)}\]
Correct Answer: D
Solution :
[d] Friction is the retarding force for the block \[F=ma=\mu R=\mu mg\] Therefore, from the first equation of motion \[v=u-at\] \[0=V-\mu g\times t\Rightarrow \frac{V}{\mu g}=t\]
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