A 60−g bullet is fired horizontally with a velocity v1 = 600 m/s into the 3−kg block of soft wood initially at rest on the horizontal surface. The bullet emerges from the block with the velocity v2 = 400 m/s, and the block is observed to slide a distance of 2.70 m before coming to rest. Determine the coefficient of kinetic friction μk between the block and the supporting surface.
