A 2kg block is shoved across a flat, rough surface with a kinetic friction coefficient of uk = 0.18. The block has an initial velocity of 15m/s and travels 1.5m before it comes in contact with a horizontal spring connected to the wall.

Determine the amount of work done on the block by friction as it traverses this 1.5m displacement (before it hits the spring) (HINT: the work equation).