In this question, use $g=9.8{m\; s}^{-2}$.

A robotic transport sled, $S$, is pulled across a rough horizontal factory floor.

A horizontal pulling force of magnitude $P$ newtons acts on $S$.

$S$ moves with a constant acceleration of $1.25{m\; s}^{-2}$.

$S$ has a weight of $15.68N$.

The only resistance force acting on $S$ is due to friction.

The coefficient of friction between $S$ and the floor is $0.3$.