A block $B$ is pushed momentarily along a horizontal surface with an initial velocity $V$. If $\mu$ is the…
A block $B$ is pushed momentarily along a horizontal surface with an initial velocity $V$. If $\mu$ is the coefficient of sliding friction between B and the surface, block B will come to rest after a time.
$\frac{g \mu}{V}$
$\frac{g}{V}$
$\frac{V}{g}$
$\frac{V}{g \mu}$
Solution
By using $v=u+a t$
$\begin{aligned}
0 & =v-\mu g t \\
\Rightarrow \quad t & =\frac{V}{\mu g}
\end{aligned}$
