Temperature Change in a Block By Friction?

A block of m m is initially sliding on a frictionless surface at a velocity v(initial), and then hits a strip of sandpaper that has a coefficient of kinetic friction (KF), and has a width of L. After ping the sandpaper, the block continues its journey once again on the frictionless surface. The sandpaper has negligible m and thermal conductivity compared to the sliding block, and is thermally insulated from the surface underneath, hence no heat can flow anywhere except into the block. If the total heat capacity of the sliding block is C, by how much does its temperature change in the process?