A 60-g bullet is fired horizontally with a velocity v1 = 600 m/s into the 3-kg block of...

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 μ_k between the block and the supporting surface.