Heat And Thermodynamics

A block of steel of mass 2 kg slides down a rough inclined plane of inclination of $\sin ^{-1}\left(\frac{3}{5}\right)$ at a constant speed. The temperature of the block as it slides through 80 cm , assuming that the mechanical energy lost is used to increase the temperature of the block is nearly (Specific heat capacity of steel $=420 \mathrm{Jkg}^{-1} \mathrm{~K}^{-1}$ and Acceleration due to gravity $=10 \mathrm{~ms}^{-2}$ )