A block of mass \( 5 \, \text{kg} \) is placed on a rough inclined surface as shown in the figure. If \( \vec{F}_1 \) is the force required to just move the block up the inclined plane and \( \vec{F}_2 \) is the force required to just prevent the block from sliding down, then the value of \( \left| \, |\vec{F}_1| - |\vec{F}_2| \, \right| \) is: \( \big[ \text{Use } g = 10 \, \text{m/s}^2 \big] \).
