A block of mass 0.08 kg is pushed against a spring with spring constant k=31 N/m. The srping is compressed 0.15 meters from its natural length. The block is released and it slides along a surface with coefficient of frition 0.45. How far does the block travel from the point at which is is released? I am having a problem developing an equation for this. It seems i am always short on something. this is what i have so far Work due to friction - work due to spring = work due to spring - work due to friction. I know i am missing something but i don't know what it is.