Kinetic friction coefficient between the block and the incline

A 2 𝑘𝑔 block is situated on a rough incline is connected to a light spring of force constant 100 𝑁⁄𝑚. The pulley is frictionless. The block is released from rest when the spring is unstretched. The block moves 20 𝑐𝑚 down the incline before coming to rest. Find the coefficient of the kinetic friction between the block and the plane.

[Andrewlik]

Thank you, this helped me solve a problem on a physics assignment :D

[luisantoniohernandez]

No se quien eres ni de donde, pero me acabas un examen. I LOVE YOU

[jajneksis]

But work energy theorem is sum of wd by all forces is equal to the change in kinetic energy