If $\vec{F}_1$ is the force required to just move the block up the inclined plane and $\overrightarrow{\mathrm{F}}_2$ is the force required to just prevent the block from sliding down, then the value of $\left|\vec{F}_1\right|-\left|\vec{F}_2\right|$ is : [Use $g=10 \mathrm{~m} / \mathrm{s}^2$ ]
$\begin{gathered}\mathrm{F}_2=\mathrm{mgsin} \theta-\mathrm{f}_{\mathrm{K}} \\ \quad=25-2.5 \sqrt{3} \\ \therefore \mathrm{~F}_1-\mathrm{F}_2=5 \sqrt{3} \mathrm{~N}\end{gathered}$