162- In the figure below, a body is under horizontal force $F_1$ and is at the threshold of motion, and under horizontal force $F_2$ it moves with constant velocity. If the friction forces in these two cases are $f_1$ and $f_2$ respectively, which statement is correct? $(\mu_s > \mu_k)$ [Figure: A block on a rough surface with horizontal force $F$ applied]
[(1)] $f_1 > f_2$ , $F_1 > F_2$
[(2)] $f_1 > f_2$ , $F_1 = F_2$
[(3)] $f_1 = f_2$ , $F_1 < F_2$
[(4)] $f_1 = f_2$ , $F_1 = F_2$
\textbf{162-} In the figure below, a body is under horizontal force $F_1$ and is at the threshold of motion, and under horizontal force $F_2$ it moves with constant velocity. If the friction forces in these two cases are $f_1$ and $f_2$ respectively, which statement is correct? $(\mu_s > \mu_k)$
\textit{[Figure: A block on a rough surface with horizontal force $F$ applied]}
\begin{itemize}
\item[(1)] $f_1 > f_2$ , $F_1 > F_2$
\item[(2)] $f_1 > f_2$ , $F_1 = F_2$
\item[(3)] $f_1 = f_2$ , $F_1 < F_2$
\item[(4)] $f_1 = f_2$ , $F_1 = F_2$
\end{itemize}
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