Finding the coefficient of kinetic friction - problem with a mass on a plane

[hollym123]

Homework Statement

A block of mass m=2.54kg sliding along a rough horizontal surface is traveling at a speed
vo= 10 m/s when it strikes a massless spring head-on (see Figure below) compressing the
spring. If the maximum compression is 10 cm and the spring constant is 25kN/m, what is
the coefficient of kinetic friction of the horizontal surface.

Diagram: https://imgur.com/a/EzW6rcH

Relevant Equations

Well since this has spring constants I guess I'd have 1/2 kx^2.

I don't really know how to begin this problem. I need some advice

 

[Flatlanderr]

Do you know the work-energy theorem?