A block of mass 0.528 kg slides with uniform velocity of 3.85 m/s on a horizontal frictionless surface. At some point, it strikes a horizontal spring in equilibrium. If the spring constant is k=26.7 N/m, by how much will the spring be compressed by the time the block comes to rest? What is the amount of compression if the surface is rough under the spring, with a coefficient of kinetic friction uk = 0.411? F = -kx W = -0.5kx^2 KE = 0.5mv^2 I found that it has 3.913 J of energy once it hits the srping, but how do i use that and incorporate it into the work done by the spring?